From Save Mount Diablo:

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Overview

Discover winter's impact on this lovely, winding creek drainage and its ponds.

In December, this lovely, winding creek drainage and its ponds may still be dry or may be coming to life again, depending upon winter temperatures and rainfall. Most of this loop hike is on footpath but at the mid-point, we may venture a short distance on fire road into the adjacent regional park for a glimpse of Mount Diablo. Be sure to bring plenty of water and a snack, and dress in layers. Sturdy shoes or hiking boots are recommended. Heavy rain cancels.
Street parking available. No restrooms.
This event is limited to 20 participants.
Land: Walnut Creek Open Space
Rating: Moderate
Distance: 3.5 mile miles if we continue on the Briones-Mt Diablo trail into Diablo Foothills EBRP to the point where the summit is 1st visible; otherwise a little shorter
Elevation change: 500'
Leader: Jean Vieth, Save Mount Diablo Hike Leader
Meet: 2085-90 Rockspring Pl, Walnut Creek, CA 94596

At the gate at the END of Rockspring Place in Walnut Creek, Shell Ridge (not the gate at mid-point). There is ample street parking along Rockspring Place, but there are no restrooms.
GPS Coordinates: 37.887578, -122.014324
Directions: Traveling north on I-680, take exit 44 for Rudgear Road; turn right onto Rudgear Road. Turn left onto San Miguel Drive, right onto Mountain View Blvd., right onto Walnut Blvd., and left onto Rockspring Place. The distance from exit 44 to the gate at the end of Rockspring Place is less than 3 miles.
Traveling south on I-680, take exit 45A for South Main Street; turn right onto South Main Street. Turn left onto Rudgear Road, left onto San Miguel Drive, right onto Mountain View Blvd, right onto Walnut Blvd., and left onto Rockspring Place. The distance from exit 45A to the gate at the end of Rockspring Place is a little more than 3 miles.

From The Watershed Project:

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December 13 @ 9:30 am – 12:00 pm

Join us for a tree planting workshop at Lynbrook Park in Bay Point, where we will be replacing 5 trees. This is our first event for our new Urban Forestry Management program with Contra Costa County.

Come learn about strategies for cooling outdoor public spaces through increased tree cover and how we can work together at the county scale to support community tree care, as well as get your hands dirty and get some new trees in the ground!

From CA State Parks & Mount Diablo Interpretive Association:

Dec 10, 2025, 9:00 AM – 1:00 PM

Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA

Reservation required @ onesuperhiker@aol.com

Have you ever wondered about the many species of organisms that inhabit our world beyond the sidewalks and streets? This is the hike for you! Wonder and wander now with us while we explore the magnificent Mitchell Canyon in Mount Diablo State Park. Each month we will search for all the fantastic and beautiful natural displays that change with the seasons.  You won't be disappointed if you have an inquisitive mind. 

We'll hike for about 4 miles with a slight elevation gain and enjoy nature's beautiful display along the way. Bring water, snacks, and binoculars if you have them. 

There is a $6 per vehicle park entrance fee ($5 for seniors). Exact cash required (no coins please); pay at the entrance gate. You may also pay digitally by scanning the QR code on the sign near the entrance gate or Visitor Center; or text CA2902 to 53242. No app is required.

Leader: Dan Fitzgerald

Presented by California State Parks

From The Watershed Project:

December 9 @ 6:00 pm – 8:00 pm

Join us for a Community Event on Tuesday, December 9, from 6:00 – 8:00 PM at the RYSE Center (3939 Bissell Ave, Richmond)

We’re launching a community-driven effort to shape the future of the Richmond shoreline.

Join us for a fun, hands-on evening to learn about sea level rise, its impact on Richmond, and explore possible solutions together.

This plan will protect our neighborhoods, restore nature, and prepare for rising seas.

We’ll have food, activities for all ages, and raffles for three $50 gift cards!

Reservation encouraged: Let us know you’re coming

For more information or to stay involved, email OurShorelineRichmond@TheWatershedProject.org

Be part of creating the solution!

From Save Mount Diablo:

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Overview

We'll venture out into the oak grasslands along the shoreline of Los Vaqueros Reservoir to see what winter brings to the land.

We’ll venture out into the oak grasslands along the shoreline of Los Vaqueros Reservoir to see what winter brings to the land and marvel at the unique adaptations of the varied plants and animals that live there. The mistletoe will be flush with white berries, the birds will be heading south, and the land will be anticipating the first rains of the season after 7-8 months of summer drought. Be sure to bring plenty of water and a snack, and dress in layers. Sturdy shoes or hiking boots are recommended; hiking poles may be useful. Heavy rain cancels.

***There will be a $4-$6 park entrance fee (exact change)

Participant Limit: 30 people

Land: Los Vaqueros Watershed—Contra Costa Water District

Rating: Easy/Moderate

Distance: 3.7 miles

Elevation change: 300 feet

Leader: Steve & Carolyn Balling, Save Mount Diablo Hike Leaders

Meet: Los Vaqueros Marina parking lot, 9990 Los Vaqueros Road, Byron, CA 94514

GPS Coordinates: 37.80876969098424, -121.74859733183341

Directions: From Vasco Road, turn north at Los Vaqueros Reservoir entrance and drive 3.2 miles to the Marina. You will need to stop at the gate and pay an entrance fee – be sure to tell them that you are hiking, not fishing, or you’ll have to pay an extra $5. Note: be sure to use the southern entrance to Los Vaqueros off Vasco Rd, not the north entrance on Walnut Blvd.

Join the Contra Costa County Flood Control and Water Conservation District, the Contra Costa Resource Conservation District, and The Restoration Trust for a fun morning outdoors, planting native grasses with other community members!

Giving Natives a Chance is an event where we plant native plant species along the creek banks of the Clayton Valley Drain and remove invasive species to help balance the local ecosystem.

Event Details:

• Children under age 12 must be accompanied by an adult.

• No experience is required.

• Tools are provided.

• This event fulfills community service requirements.

• Activities include planting, picking up trash, and removing invasive plants.

  What to bring:

• Clothes that can get dirty

• Long pants

• Closed toed shoes

• Sun protection

• Water bottle

• Gardening gloves

• Small garden trowel
  
  Register for the event on Eventbrite!

From The Watershed Project:

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December 6 @ 8:00 am – 12:00 pm

Join The Watershed Project and Golden Gate Bird Alliance for a day focused on this very special creek, running right next to a community center. Come at 8 AM for a chance to learn about the birds that travel this waterway on their fall migration, and hopefully spot a few of them! At 9:30, we will transition to a short creek clean up and adding some more plants to the pollinator garden and bioswale that surround the community center and parking lot. And of course, there will be time for snacks and conversation.

This area is a very special example of how “green infrastructure” can do much more than filter water. With more than 25 species of native plants and a healthy riparian corridor, this section of Baxter Creek is truly a feast for wildlife as they travel through the city.

From Save Mount Diablo:

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12th Annual Dr. Mary Bowerman Science & Research Colloquium

Tamalpais Room, 2150 Allston Way

Dec 5 from 8:30am to 12:30pm PST

Overview

Please join us for the 12th Annual Dr. Mary Bowerman Science and Research Colloquium!

Dr. Mary Leolin Bowerman co-founded Save Mount Diablo in 1971. Mary was a botanist and a student of the flora of Mount Diablo for over 70 years. In her honor, Save Mount Diablo established the Mary Bowerman Science and Research Program in 2013.

In addition to facilitating research on and around the mountain by offering micro-grant awards, one of the goals of the program is to share valuable findings and management implications for Mount Diablo’s natural resources with the public.

Save Mount Diablo will be hosting the 12th annual Dr. Mary Bowerman Science and Research Colloquium on Friday, December 5th, 2025 at the David Brower Center in downtown Berkeley. The Colloquium will inform other scientists, researchers, and the general public about ongoing projects and discoveries in the Diablo Range.

The colloquium will be held in the Tamalpais Room at the David Brower Center.

The David Brower Center is one block away from the Downtown Berkeley BART Station.

There is also a parking garage on the same block (the Oxford Garage) for $2/hr and metered street parking available.

Join us for light refreshments before the presentations and lunch afterwards.

Doors Open & Light Refreshments: 8:30 AM - 9:00 AM

Presentations: 9:00 AM – 12:00 PM

Reception: 12:00 – 12:30 PM

Speakers:

Welcome

• Sean Burke (Land Programs Director, Save Mount Diablo)

Introduction

• Seth Adams (Land Conservation Director, Save Mount Diablo)

Fifteen Years of Northwestern Pond Turtle Mark-Recapture Study in a Livestock Pond Subject to Drought in Central California

• David "Doc Quack" Riensche (Wildlife Biologist & Senior Ecologist)

Preparing a Flora of the East Bay, California

• Barbara Leitner (Co-President, California Native Plant Society, East Bay Chapter )

Ecological Ripple Effects: Squirrel Survival and Behavior Following a Vole Population Boom

• Dr Sonja Wild (Postdoctoral Researcher affiliated with University of California, Davis)

Saving the "Valley Dragons": Fresno Chaffee Zoo's Blunt-nosed Leopard Lizard Recovery Program in the Diablo Range

• Rory Telemeco (PhD, Research Director at Fresno Chaffee Zoo)

BREAK

The Ecology of Scorpions of the Diablo Range With a Focus on Paruroctonus variabilis

• Prakrit Jain (Student Researcher at University of California, Berkeley)

Disease Dynamics in the Northern Population of the Western Spadefoot

• Jakob Woodall (M.S. Student, Vredenburg Lab)

Nest Site Selection in a Population of Northwestern Pond Turtles on a Managaed Livestock Rangeland

• Madie Stein (Sonoma State University Masters Student)

Boxed In: Tule Elk in the Diablo Range

• Rick Lanman (President of the Institute for Historical Ecology)

Closing Remarks

• Malcolm Sproul (Science and Research Committee Chair, Save Mount Diablo)

From John Muir Land Trust:

This moderate six-mile hike features some challenging hills, but the reward is worth it—we’ll discover annual wildflowers that only bloom at this special time of year! We’ll meet at the Mt. Wanda Trailhead parking lot at 9:00am sharp for quick introductions before hitting the trail by 9:10am. Note: There are no restrooms at the trailhead, so please plan accordingly. You’ll find facilities at the gas station across from the John Muir National Historic Site if needed before we start.

When: Saturday, November 29, 9am – 12pm

Where: Mount Wanda trailhead

What to bring/wear: Comfortable clothing, hiking boots/sturdy shoes, hiking poles (if you use them), hat, water, sunscreen, snack.

** Please note that you do not need to register to participate in JMLT’s guided hikes. Just show up the morning of with your hat, boots, and sense of wonder. Oh, and a snack! For questions or concerns about the hikes, please contact Ricardo Black, Manager of Stewardship and Public Outreach at (925) 726-5338.

From The Watershed Project:

Sign up!

November 22 @ 9:30 am – 12:00 pm

The park re-design at Shields-Reid Park includes some community garden areas that we have an opportunity to fill! We will be planting a variety of native plants and culinary herbs that smell good, make nice tea, and offer beautiful blooms, for anyone to harvest and enjoy. Come enjoy a relaxed day of planting and learning how to grow and use these friendly plants.

From John Muir Land Trust:

Your expert guide will lead you a 5-mile hike along rolling hills, through oak woodlands, and past seasonal creeks while sharing stories of local wildlife, native plants, and conservation efforts that keep these lands wild and accessible. Whether you’re a seasoned hiker or looking to explore somewhere new, this moderate trek offers breathtaking views, fresh air, and the chance to connect with fellow nature lovers. Note: Restrooms are available on site.

When: Saturday, November 22, 9am – 12pm

Where: Fernandez Ranch, 1081 Christie Rd, Martinez, CA 94553

What to bring/wear: Comfortable clothing, hiking boots, hiking poles (if you use them), hat, water, sunscreen, snack.

** Please note that you do not need to register to participate in JMLT’s guided hikes. Just show up the morning of with your hat, boots, and sense of wonder. Oh, and a snack! For questions or concerns about the hikes, please contact Ricardo Black, Manager of Stewardship and Public Outreach at (925) 726-5338.

From Contra Costa County Library and Friends of San Ramon Creek:

Monday, November 17, 2025

6:00PM – 7:00PM

Danville Library, Mt. Diablo Room

Description

Mark Boucher Senior, Hydrologist for the CCC Flood Control District, will deliver a presentation on how prepare for floods. Mark established a network of stream flow gauges around the county, so they can accurately track where trouble spots might be during heavy storms. You will learn how to monitor creek levels relative to flood stages and gain awareness of flooding potential to support informed decision-making during storm events.

From The Watershed Project:

Sign up!

November 15 @ 9:30 am – 12:00 pm

Wait, what’s a bioswale again? This special garden is sloped to encourage the rain to flow in, not away! It keeps the adjacent Greenway Trail from flooding, and offers a bounty of native plants for pollinators and birds.

Join us for our fall planting day! We will be adding more plants to the east end of the garden and topping off the mulch that is so important for helping soil to harvest and hold water. We will start the day with a short introduction to this garden and its many plants, and how it was designed to “plant water.” Then we will get our hands dirty, and finish the day with some snacks and conversation.

The best area to park is along Ohio Ave or the side streets near Unity Park. Then just walk into Unity Park and follow the trail past (or through) the orchard to meet us.

From Save Mount Diablo:

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Project: Pulling stinkwort (Dittrichia graveolens), an invasive weed, along Little Pine Creek in Diablo Foothills Regional Park. Volunteers will use their hands and tools to remove patches of weeds from a few areas in the Park to make more space for native plants to thrive. This activity involves a short amount of hiking to the work site, followed by a fair amount of bending and pulling out the weeds. 

Meet: Orchard Staging Area parking lot (37.896796, -121.998117)

Parking Directions: Orchard Staging Area (37.896796, -121.998117) or other parking lots at Diablo Foothills Regional Park.

What to Bring: Water and snacks, sturdy shoes, comfy clothes with sun and/or rain protection, gloves if you have them. Gloves and tools will also be provided. This activity may involve walking through tall grasses with pesky seeds. Volunteers may wish to wear materials that won't attract so many seeds (such as wicking material or natural fiber clothing and avoiding fleece). 

Minors must be accompanied by an adult.

Participants will be notified in the event of cancellation due to extreme weather conditions. An AQI (Air Quality Index) of 150 or above automatically cancels the workday.

This event is in partnership East Bay Regional Park District and will be led by EBRPD Rangers.

Forum meetings are open to the public and take place on Zoom. To receive meeting invites, please add your email address to the Forum email list by filling out the form at the bottom of this webpage.

Join The Watershed Project, the Contra Costa Resource Conservation District, and volunteers from Friends of Pleasant Hill Creeks for an educational creek restoration event. Grayson Creek is home to more than 100 bird species and also provides habitat for river otters, western pond turtles, and even beavers! Help protect this important community resource by removing trash from the creek banks.

Dress appropriately for outdoor work. Wear long sleeves and long pants, sturdy shoes, and wear sun protection (hat and/or sunscreen). All cleanup supplies, water, and light refreshments will be provided. Please bring a reusable water bottle and your own gloves if you have them.

Volunteers must be at least 16 years old. All volunteers under 18 years old must have parental permission to participate or be accompanied by an adult.

Contact Paula White at paula@thewatershedproject.org for more information.

Register for the event here.

From East Bay Regional Park District:
Habitat Restoration at Wildcat Wildcat Canyon - Alvarado Staging

Come join us as we restore habitat in the Wildcat Creek Watershed.

Age Restrictions: Youth under the age of 18 must have a signed permission by parent or legal guardian. Youth under the age of 13 must be accompanied by an adult.

Description: Come help restore habitat at Wildcat Canyon with your local community.

What to Bring: water bottle, gloves, and PPE. Wear sturdy hiking boots, closed toed shoes, long pants, long sleeve shirt.

What is Provided: Necessary tools.

Weather: Heavy rain or unsafe wildfire smoke conditions cancel the program. Please wear layers as Bay Area weather can be unpredictable.

Sign up here: https://apply.ebparks.org/custom/501/opp_details/3445

From Contra Costa Water District:

Get your free ticket on Eventbrite!

Where does your water come from?

Join Contra Costa Water District for a behind-the-scenes look at the system that brings safe, high-quality water to your tap.

This free, all-day bus tour takes you from the Delta to your drinking water. You'll visit key facilities, meet the people who operate the them, and learn how we manage and protect your water every step of the way.

Tour Details

• Tours begin in Concord at 8:40 a.m. sharp. We aim to return by 3:30 p.m.

• All participants must ride the bus. Personal vehicles cannot follow the tour.

• Lunch and light refreshments are provided.

• Limit of two participants per booking.

• This tour fills up quickly. If you've attended a CCWD tour before, please allow others the chance to join.

Who Can Attend

• Attendees must live or work in Contra Costa Water District's service area.

• Attendees must be 18 years or older.

• Attendees must be able to climb stairs and walk throughout the day.

What to Wear

• Closed-toe shoes are required.

• Dress in layers, including long pants, long-sleeves and a jacket.

• Depending on the weather, consider a hat and sunblock.

Itinerary

• Delta Intake Facilities

• Los Vaqueros Dam and Reservoir

• Contra Costa Canal

• Randall-Bold Water Treatment Plant

• Bailey Reservoir and Pump Station

This Forum gathering will be a field trip to Pacheco Marsh. Learn more and register here!

To receive Forum invites, please add your email address to the Forum email list by filling out the form at the bottom of this webpage.

From Save Mount Diablo:

Get Tickets here

A scientist exploring California in the 1860s described Mount Diablo's tarantulas as "attaining the size of a half-grown mouse, possessing fangs the size of a rattlesnake's, and delivering a bite generally considered fatal." Yeesh.

Is this the gruesome truth or just arachnophobia? Let’s find out!

Join us for a nature walk through Mitchell Canyon and we will dispel any malicious rumors you might have heard about Mount Diablo’s misunderstood arachnids. As the sun sets, we’ll be on the lookout for another one of Mount Diablo arachnids – scorpions!

Be sure to bring plenty of water and a snack, and dress in layers. Sturdy shoes or hiking boots are recommended. Heavy rain cancels. Restrooms are available at the parking lot.

***There will be a $6 park entrance fee (exact cash required)

Participant Limit: 20 people

Land: Mount Diablo State Park

Rating: Easy

Distance: 2 miles

Elevation change: 300 feet

Leader: Ken Lavin, Save Mount Diablo Hike Leader and Naturalist

Meet: Mitchell Canyon Interpretive Center parking area, 96 Mitchell Canyon Rd, Clayton, CA 94517

GPS Coordinates: 37.920526478998255, -121.94154776066564

Directions: From I-680, head east on Ygnacio Valley Road for 7.5 miles, then turn right on Clayton Road. Continue on Clayton Road, take a right on Mitchell Canyon Road, and follow it to the end.

From East Bay Regional Park District:

BLACK DIAMOND MINES REGIONAL PRESERVE - Wow it's hot out here! Where's the water?

While hard to find at Black Diamond in the summertime, water is still important for the animals, plants, and people in the park. Come beat the heat by exploring how water moves all around us and shapes the land with hands-on activities and demonstrations for the whole family. Be ready to get a little wet! Best for ages 5-12 years.

Meet in the upper parking lot, which is a mile past the kiosk.

Black Diamond Mines (Antioch): Upper Parking Lot

http://goo.gl/maps/jPYOx

$5 per vehicle parking fee applies when kiosk is attended.

No-registration required; Drop-in Program only.

For more info, visit: https://anc.apm.activecommunities.com/ebparks/activity/search/detail/56000?onlineSiteId=0&from_original_cui=true

From Save Mount Diablo:

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Join us for a beautiful evening of plein air painting at Save Mount Diablo's Curry Canyon Ranch. Keep your eyes out; you might see bobcats and coyotes looking for a snack, plus burrowing owls, quail, and many other feathered friends who are active in the evening.

Restrooms available on site.

What to Bring:

• Dress in layers

• Wear shoes you're comfortable hiking in

• Plenty of water

• Snacks

• A blanket (if you'd like to sit on the grass to paint)

• Painting materials (i.e. canvas, paintbrushes, paint, water cups, etc.) - Save Mount Diablo will also provide watercolors/paintbrushes/postcard painting paper to anyone who would like some

• A backpack for all your materials

NOTE: We will be driving all the materials up to the painting site.

Heavy rain cancels.

Participant Limit: 20 people

Land: Save Mount Diablo’s Curry Canyon Ranch

Rating: Easy/Moderate

Distance: TBD

Elevation change: TBD

Leader: Arsenio Baca

Meet: 3500 Curry Canyon Rd, Clayton, CA 94517

GPS Coordinates: 37.866193, -121.881976

Directions: From Ygnacio Valley Road, take a right on to Clayton Road. Clayton Road becomes Marsh Creek Road. From Marsh Creek Road turn right on to Morgan Territory Road then turn right on to Curry Canyon Road. Drive for 1.2 miles (~5 minutes) to 3500 Curry Canyon Road, Clayton, CA 94517.

Note: Google Maps may tell you to make a U-turn once you are on Curry Canyon Road. Please ignore this and keep following the main road, you are going the correct way! Curry Canyon Road will also become a gravel road when you are almost to the property, do not be discouraged, you are still going the correct way! Lastly, there are many Private Property and No Trespassing Signs along the road, do not fret, as long as you stay on the main road you are still going the correct way!

From East Bay Regional Park District:
Habitat Restoration at Wildcat Wildcat Canyon - Alvarado Staging

Come join us as we restore habitat in the Wildcat Creek Watershed.

Age Restrictions: Youth under the age of 18 must have a signed permission by parent or legal guardian. Youth under the age of 13 must be accompanied by an adult.

Description: Come help restore habitat at Wildcat Canyon with your local community.

What to Bring: water bottle, gloves, and PPE. Wear sturdy hiking boots, closed toed shoes, long pants, long sleeve shirt.

What is Provided: Necessary tools.

Weather: Heavy rain or unsafe wildfire smoke conditions cancel the program. Please wear layers as Bay Area weather can be unpredictable.

Sign up here: https://apply.ebparks.org/custom/501/opp_details/3445

From CA State Parks & Mount Diablo Interpretive Association:

Aug 13, 2025, 8:30 AM – 12:30 PM

Mitchell Canyon Visitor Center, 96 Mitchell Canyon Rd, Clayton, CA 94517, USA

Reservation required @ onesuperhiker@aol.com

Have you ever wondered about the many species of organisms that inhabit our world beyond the sidewalks and streets? This is the hike for you! Wonder and wander now with us while we explore the magnificent Mitchell Canyon in Mount Diablo State Park. Each month we will search for all the fantastic and beautiful natural displays that change with the seasons.  You won't be disappointed if you have an inquisitive mind. 

We'll hike for about 4 miles with a slight elevation gain and enjoy nature's beautiful display along the way. Bring water, snacks, and binoculars if you have them. 

There is a $6 per vehicle park entrance fee ($5 for seniors). Exact cash required (no coins please); pay at the entrance gate. You may also pay digitally by scanning the QR code on the sign near the entrance gate or Visitor Center; or text CA2902 to 53242. No app is required.

Leader: Dan Fitzgerald

Presented by California State Parks

From The Watershed Project:

August 9 @ 10:00 am - 12:00 pm

Register here/Regístrate aquí

*This event is part of the Wildcat Creek Awareness Campaign – A series of events that spur exploration of Wildcat Creek*

Join us at Tilden Regional Park for a bilingual reading of our children’s storybook, Kiyana and the Wildcat Creek, followed by a guided nature hike through the park by East Bay Regional Park’s naturalist! This event is perfect for families, nature enthusiasts, and anyone interested in learning more about the wildlife and ecology of Wildcat Creek. It’s a chance to see the creek through fresh eyes and experience the magic of storytelling and outdoor exploration in one.

¡Acompáñanos en el Parque Regional Tilden para una lectura bilingüe de nuestro cuento infantil Kiyana y el Arroyo Wildcat, seguida de una caminata guiada por la naturaleza con un/a naturalista del Parque Regional del Este de la Bahía! Este evento es perfecto para familias, amantes de la naturaleza y cualquier persona interesada en aprender más sobre la vida silvestre y la ecología del arroyo Wildcat. Es una oportunidad para ver el arroyo con nuevos ojos y experimentar la magia de los cuentos y la exploración al aire libre en un solo evento.

From Contra Costa Water District:

Get your free ticket on Eventbrite!

Have you ever wondered what is involved in the treatment of your drinking water? Would you like to see how we produce the safe, high-quality drinking water that is delivered to your home?

Reserve your spot on a free tour of Contra Costa Water District's Ralph D. Bollman Water Treatment Plant. See each step of your water’s journey through the treatment processes. You’ll go behind the scenes to learn how this vital infrastructure works!

Please Note: If you have previously attended a CCWD tour, we ask that you please do not register. Allow others an opportunity to see their infrastructure.

Details

- Tour begins at 9 a.m. sharp. Meet at the Ralph D. Bollman Water Treatment Plant in Concord. Please arrive at least 15 minutes early to check in.

- Attendees must be able to climb stairs.

- Attendees must be at least 13 years of age. Attendees under 18 years of age must be accompanied by an adult.

- Attendees must be treated water customers within the Contra Costa Water District service area.

- Group bookings are not accepted. You may purchase a maximum of two tickets per booking.

How to Dress

- Attendees must wear comfortable closed-toe shoes.

- Attendees are advised to wear layers, including long pants, long-sleeve shirts and jackets.

From East Bay Regional Park District:

BLACK DIAMOND MINES REGIONAL PRESERVE - Lichen are fascinating organisms we find here at Black Diamond, with unique structures and characteristics that support each other and the ecosystem around them. Join us to learn about their importance in our ecosystem!

Meet in the upper parking lot, which is a mile past the kiosk.

Black Diamond Mines (Antioch): Upper Parking Lot

http://goo.gl/maps/jPYOx

$5 per vehicle parking fee applies when kiosk is attended.

No-registration required; Drop-in Program only.

For more info, visit: https://anc.apm.activecommunities.com/ebparks/activity/search/detail/55993?onlineSiteId=0&from_original_cui=true

From Save Mount Diablo:

Get Tickets here

Beat the summer heat on this early morning outing on Mangini Ranch. Save Mount Diablo’s 208-acre property includes the headwaters of Galindo Creek with rolling grasslands, oaks, buckeyes, and a rare desert olive grove. Visit a secret spring and keep your eyes out; you might see bobcats and coyotes looking for breakfast, plus burrowing owls, quail, and many other feathered friends who are active in the morning. This is a two-hour hike with one strenuous climb. Three to five short meditations will be offered during the hike. Be sure to dress in layers and wear sturdy boots or shoes; bring plenty of water and a snack. Restrooms not available. Heavy rain cancels.

Participant Limit: 20 people

Land: Save Mount Diablo’s Mangini Ranch Educational Preserve

Rating: Easy/Moderate

Distance: 3 miles

Elevation change: 300 feet

Leader: Jim & Sharon Lawrence, Save Mount Diablo Volunteer Hike Leaders

Meet: California Riding & Hiking Trail Trailhead, 5307 Crystyl Ranch Dr, Concord, CA 94521

GPS Coordinates: 37.930923897897294, -121.97365127503966

Directions: From Ygnacio Valley Road, turn south on Crystyl Ranch Drive in Concord. Continue on Crystyle Ranch Drive for one and a half miles until you reach the hiker gate next to 5318 Crystyl Ranch Drive on the south side of the street.

From The Watershed Project:

*This event is part of the Wildcat Creek Awareness Campaign – A series of events that spur exploration of Wildcat Creek*

The Watershed Project and Safe Organized Spaces (SOS) Richmond are co-leading a creek cleanup at Wildcat Creek with local organizations from across West Contra Costa County. This collaborative effort highlights the power of community partnerships in protecting and restoring our shared watershed.

From East Bay Regional Park District:

RADKE MARTINEZ REGIONAL SHORELINE - Join us during National Moth Week as we gather after dark to use UV lights and attract a variety of moths. We'll use iNaturalist to identify and record what we find to help better understand local moth populations. Come connect with nature at night while contributing to valuable scientific research. Be sure to bring a flashlight and wear comfortable clothing for nighttime exploration!

Meet at the main Radke Martinez Shoreline Parking lot (first left onto N Court, 300 North Court St.)

Radke Martinez Shoreline (Martinez): Parking lot off N. Court St.

https://goo.gl/maps/Dk3JW

No-registration required; Drop-in Program only.

For more info, visit: https://anc.apm.activecommunities.com/ebparks/activity/search/detail/55992?onlineSiteId=0&from_original_cui=true