Save Mount Diablo
@savemountdiablo.bsky.social
Preserve, Defend, Restore, Educate, Enjoy.
Since 1971, we and our partners have protected over 120,000 acres on and around Mount Diablo.
https://lnk.bio/savemountdiablo
Since 1971, we and our partners have protected over 120,000 acres on and around Mount Diablo.
https://lnk.bio/savemountdiablo
Happy National Bird Day! 🐦🦅
To celebrate, we're sharing a few of the awesome birds we've spotted in the Diablo Range.
1. greater roadrunner
2. California condor
3. acorn woodpecker
4. golden eagle
The Diablo Range is a haven for birds; some areas support as many as 200 species.
📸: Scott Hein
To celebrate, we're sharing a few of the awesome birds we've spotted in the Diablo Range.
1. greater roadrunner
2. California condor
3. acorn woodpecker
4. golden eagle
The Diablo Range is a haven for birds; some areas support as many as 200 species.
📸: Scott Hein
January 5, 2026 at 5:02 PM
Happy National Bird Day! 🐦🦅
To celebrate, we're sharing a few of the awesome birds we've spotted in the Diablo Range.
1. greater roadrunner
2. California condor
3. acorn woodpecker
4. golden eagle
The Diablo Range is a haven for birds; some areas support as many as 200 species.
📸: Scott Hein
To celebrate, we're sharing a few of the awesome birds we've spotted in the Diablo Range.
1. greater roadrunner
2. California condor
3. acorn woodpecker
4. golden eagle
The Diablo Range is a haven for birds; some areas support as many as 200 species.
📸: Scott Hein
Enjoy a glimpse of the beautiful Nunn-Paulsen inholding, which was generously donated to us by Bob Nunn this December.
This remote and lush piece of the mountain is teeming with life, and turning green as the mountain soaks up the winter rains.
📸: Emily Sherwood and Mary Nagle
This remote and lush piece of the mountain is teeming with life, and turning green as the mountain soaks up the winter rains.
📸: Emily Sherwood and Mary Nagle
January 4, 2026 at 5:02 PM
Enjoy a glimpse of the beautiful Nunn-Paulsen inholding, which was generously donated to us by Bob Nunn this December.
This remote and lush piece of the mountain is teeming with life, and turning green as the mountain soaks up the winter rains.
📸: Emily Sherwood and Mary Nagle
This remote and lush piece of the mountain is teeming with life, and turning green as the mountain soaks up the winter rains.
📸: Emily Sherwood and Mary Nagle
New year. New adventures!
Our 2026 Discover Diablo schedule is out, with 37 hikes and outings planned for this year!
We offer free guided hikes, themed walks, and other outdoor activities including mountain biking, rock climbing, plein air painting, and more.
savemountdiablo.org/discoverdiablo
Our 2026 Discover Diablo schedule is out, with 37 hikes and outings planned for this year!
We offer free guided hikes, themed walks, and other outdoor activities including mountain biking, rock climbing, plein air painting, and more.
savemountdiablo.org/discoverdiablo
January 2, 2026 at 5:03 PM
New year. New adventures!
Our 2026 Discover Diablo schedule is out, with 37 hikes and outings planned for this year!
We offer free guided hikes, themed walks, and other outdoor activities including mountain biking, rock climbing, plein air painting, and more.
savemountdiablo.org/discoverdiablo
Our 2026 Discover Diablo schedule is out, with 37 hikes and outings planned for this year!
We offer free guided hikes, themed walks, and other outdoor activities including mountain biking, rock climbing, plein air painting, and more.
savemountdiablo.org/discoverdiablo
Happy New Year! California State Parks is starting the new year right with a day of more than 80 free adventures in over 60 parks on New Year's Day.
Start 2026 on the right foot and get outside!
Check out what adventures are available near you: www.parks.ca.gov/firstdayhikes
📸: Scott Hein
Start 2026 on the right foot and get outside!
Check out what adventures are available near you: www.parks.ca.gov/firstdayhikes
📸: Scott Hein
January 1, 2026 at 5:03 PM
Happy New Year! California State Parks is starting the new year right with a day of more than 80 free adventures in over 60 parks on New Year's Day.
Start 2026 on the right foot and get outside!
Check out what adventures are available near you: www.parks.ca.gov/firstdayhikes
📸: Scott Hein
Start 2026 on the right foot and get outside!
Check out what adventures are available near you: www.parks.ca.gov/firstdayhikes
📸: Scott Hein
The sun is setting on 2025, but it's not too late to support our work this year!
Each donation, no matter the size, will help us start the new year strong. Help us launch into 2026, and protect more of Mount Diablo's wild lands.
savemountdiablo.org/donate
📸: Larry Porter
Each donation, no matter the size, will help us start the new year strong. Help us launch into 2026, and protect more of Mount Diablo's wild lands.
savemountdiablo.org/donate
📸: Larry Porter
December 31, 2025 at 5:02 PM
The sun is setting on 2025, but it's not too late to support our work this year!
Each donation, no matter the size, will help us start the new year strong. Help us launch into 2026, and protect more of Mount Diablo's wild lands.
savemountdiablo.org/donate
📸: Larry Porter
Each donation, no matter the size, will help us start the new year strong. Help us launch into 2026, and protect more of Mount Diablo's wild lands.
savemountdiablo.org/donate
📸: Larry Porter
Tomorrow is the last day to give in 2025!
Thanks to you, we've celebrated many victories for Mount Diablo and the mountain range that sustains it.
We're so close to our goal; your support could bring us over the finish line just in time for the new year!
savemountdiablo.org/donate
Thanks to you, we've celebrated many victories for Mount Diablo and the mountain range that sustains it.
We're so close to our goal; your support could bring us over the finish line just in time for the new year!
savemountdiablo.org/donate
December 30, 2025 at 5:03 PM
Tomorrow is the last day to give in 2025!
Thanks to you, we've celebrated many victories for Mount Diablo and the mountain range that sustains it.
We're so close to our goal; your support could bring us over the finish line just in time for the new year!
savemountdiablo.org/donate
Thanks to you, we've celebrated many victories for Mount Diablo and the mountain range that sustains it.
We're so close to our goal; your support could bring us over the finish line just in time for the new year!
savemountdiablo.org/donate
We're overwhelmed with gratitude for the amazing community who keeps coming out to give back to nature with us!
Get a closer look at their work, and other projects we've been working on: savemountdiablo.org/blog/in-a-month-of-generosity-students-and-volunteers-join-us-to-give-back-to-nature/
Get a closer look at their work, and other projects we've been working on: savemountdiablo.org/blog/in-a-month-of-generosity-students-and-volunteers-join-us-to-give-back-to-nature/
In a Month of Generosity, Students and Volunteers Join Us to Give Back to Nature
Stewardship Update Written by Haley Sutton, Land Stewardship Associate and Kendra Smith, Education & Outreach Coordinator Sixth Annual Pine Canyon Cleanup This year’s Pine Canyon Cleanup engaged 20…
savemountdiablo.org
December 29, 2025 at 5:05 PM
We're overwhelmed with gratitude for the amazing community who keeps coming out to give back to nature with us!
Get a closer look at their work, and other projects we've been working on: savemountdiablo.org/blog/in-a-month-of-generosity-students-and-volunteers-join-us-to-give-back-to-nature/
Get a closer look at their work, and other projects we've been working on: savemountdiablo.org/blog/in-a-month-of-generosity-students-and-volunteers-join-us-to-give-back-to-nature/
Take a minute to turn your volume up and enjoy the sounds of Mount Diablo's Mitchell Creek. 🔊
The creeks have come alive in the Diablo region―marking the start of winter on the mountain.
📸: Laura Kindsvater
The creeks have come alive in the Diablo region―marking the start of winter on the mountain.
📸: Laura Kindsvater
December 26, 2025 at 5:02 PM
Take a minute to turn your volume up and enjoy the sounds of Mount Diablo's Mitchell Creek. 🔊
The creeks have come alive in the Diablo region―marking the start of winter on the mountain.
📸: Laura Kindsvater
The creeks have come alive in the Diablo region―marking the start of winter on the mountain.
📸: Laura Kindsvater
Happy Holidays from Save Mount Diablo!🎄
If you want to get outside, try out Mount Diablo's Twin Peaks loop! Twin Peaks provides an excellent workout with beautiful views of the East Bay.
If you want to get outside, try out Mount Diablo's Twin Peaks loop! Twin Peaks provides an excellent workout with beautiful views of the East Bay.
A Good Trail to Hike in Winter: Twin Peaks
On the north side of Mount Diablo State Park are the smaller peaks of Mount Diablo. They include Twin Peaks at 1,733 feet and Eagle Peak at 2,369 feet elevation.…
savemountdiablo.org
December 25, 2025 at 5:03 PM
Happy Holidays from Save Mount Diablo!🎄
If you want to get outside, try out Mount Diablo's Twin Peaks loop! Twin Peaks provides an excellent workout with beautiful views of the East Bay.
If you want to get outside, try out Mount Diablo's Twin Peaks loop! Twin Peaks provides an excellent workout with beautiful views of the East Bay.
Blunt-nosed leopard lizards might be the most mind-boggling creatures inhabiting the Diablo Range.
These lizards are not only protected under the Endangered Species Act, they’re among the first species that were granted protection, along with California condors and grizzly bears.
These lizards are not only protected under the Endangered Species Act, they’re among the first species that were granted protection, along with California condors and grizzly bears.
Blunt-Nosed Leopard Lizard
Blunt-nosed leopard lizards (Gambelia sila) might just be the most mind-boggling creatures inhabiting the Diablo Range. It’s not merely because leopard lizards are desert creatures—the Diablo Range…
savemountdiablo.org
December 24, 2025 at 5:04 PM
Blunt-nosed leopard lizards might be the most mind-boggling creatures inhabiting the Diablo Range.
These lizards are not only protected under the Endangered Species Act, they’re among the first species that were granted protection, along with California condors and grizzly bears.
These lizards are not only protected under the Endangered Species Act, they’re among the first species that were granted protection, along with California condors and grizzly bears.
Exciting news for the Diablo Range!
The Santa Clara Valley Habitat Agency is proposing to construct up to three wildlife crossings along Pacheco Pass―one of the two freeways that cut through the Diablo Range, impeding wildlife movement.
ceqanet.lci.ca.gov/2025100438
📸: tule elk | Sean Burke
The Santa Clara Valley Habitat Agency is proposing to construct up to three wildlife crossings along Pacheco Pass―one of the two freeways that cut through the Diablo Range, impeding wildlife movement.
ceqanet.lci.ca.gov/2025100438
📸: tule elk | Sean Burke
December 23, 2025 at 5:04 PM
Exciting news for the Diablo Range!
The Santa Clara Valley Habitat Agency is proposing to construct up to three wildlife crossings along Pacheco Pass―one of the two freeways that cut through the Diablo Range, impeding wildlife movement.
ceqanet.lci.ca.gov/2025100438
📸: tule elk | Sean Burke
The Santa Clara Valley Habitat Agency is proposing to construct up to three wildlife crossings along Pacheco Pass―one of the two freeways that cut through the Diablo Range, impeding wildlife movement.
ceqanet.lci.ca.gov/2025100438
📸: tule elk | Sean Burke
We're getting closer to our year-end fundraising goal. Help us cross the finish line!
You are inspiring young people to connect with nature in meaningful ways.
This year, 641 students participated in our educational programs on Mount Diablo.
savemountdiablo.org/donate
📸: Emily Sherwood
You are inspiring young people to connect with nature in meaningful ways.
This year, 641 students participated in our educational programs on Mount Diablo.
savemountdiablo.org/donate
📸: Emily Sherwood
December 22, 2025 at 5:03 PM
We're getting closer to our year-end fundraising goal. Help us cross the finish line!
You are inspiring young people to connect with nature in meaningful ways.
This year, 641 students participated in our educational programs on Mount Diablo.
savemountdiablo.org/donate
📸: Emily Sherwood
You are inspiring young people to connect with nature in meaningful ways.
This year, 641 students participated in our educational programs on Mount Diablo.
savemountdiablo.org/donate
📸: Emily Sherwood
Today, we're enjoying the first day of winter! ❄️⛰
Enjoy a few of our favorite images of snowy Mount Diablo from years past!
📸: Scott Hein
Enjoy a few of our favorite images of snowy Mount Diablo from years past!
📸: Scott Hein
December 21, 2025 at 5:03 PM
Today, we're enjoying the first day of winter! ❄️⛰
Enjoy a few of our favorite images of snowy Mount Diablo from years past!
📸: Scott Hein
Enjoy a few of our favorite images of snowy Mount Diablo from years past!
📸: Scott Hein
We were wowed by the amazing research presented this year at our Mary Bowerman Science and Research colloquium! Presenters gave us an inside look on some groundbreaking work on tule elk, scorpions, local carnivorous ground squirrels, and more.
We'll be uploading videos to YouTube soon. Stay tuned!
We'll be uploading videos to YouTube soon. Stay tuned!
December 19, 2025 at 5:04 PM
We were wowed by the amazing research presented this year at our Mary Bowerman Science and Research colloquium! Presenters gave us an inside look on some groundbreaking work on tule elk, scorpions, local carnivorous ground squirrels, and more.
We'll be uploading videos to YouTube soon. Stay tuned!
We'll be uploading videos to YouTube soon. Stay tuned!
We're closing out a year of historic conservation victories for Mount Diablo and its sustaining Diablo Range.
Today, we're more than 70 percent to our year-end fundraising goal, and we need your support!
savemountdiablo.org/donate
Today, we're more than 70 percent to our year-end fundraising goal, and we need your support!
savemountdiablo.org/donate
Donate Now
2025 was a year of conservation wins—thanks to you. Your donation defends open spaces, advances conservation policy, and protects wildlife habitat. Make your year-end gift today. Every dollar up to…
savemountdiablo.org
December 18, 2025 at 5:05 PM
We're closing out a year of historic conservation victories for Mount Diablo and its sustaining Diablo Range.
Today, we're more than 70 percent to our year-end fundraising goal, and we need your support!
savemountdiablo.org/donate
Today, we're more than 70 percent to our year-end fundraising goal, and we need your support!
savemountdiablo.org/donate
We're gearing up for planting season! 🌱
Our stewardship team recently purchased a variety of native plants including silver bush lupine and California rose.
Help us put some plants in the ground: savemountdiablo.volunteerhub.com/vv2/lp/smddi...
📸: Scott Hein, Laura Kindsvater and Haley Sutton
Our stewardship team recently purchased a variety of native plants including silver bush lupine and California rose.
Help us put some plants in the ground: savemountdiablo.volunteerhub.com/vv2/lp/smddi...
📸: Scott Hein, Laura Kindsvater and Haley Sutton
December 17, 2025 at 5:04 PM
We're gearing up for planting season! 🌱
Our stewardship team recently purchased a variety of native plants including silver bush lupine and California rose.
Help us put some plants in the ground: savemountdiablo.volunteerhub.com/vv2/lp/smddi...
📸: Scott Hein, Laura Kindsvater and Haley Sutton
Our stewardship team recently purchased a variety of native plants including silver bush lupine and California rose.
Help us put some plants in the ground: savemountdiablo.volunteerhub.com/vv2/lp/smddi...
📸: Scott Hein, Laura Kindsvater and Haley Sutton
Having once reached the verge of local extinction, Bay Area burrowing owls are making a comeback thanks to POST, Santa Clara Valley Habitat Agency, Santa Clara Valley Open Space Authority, and Talon.
Over 120 adult burrowing owls were observed in Santa Clara County this year (in 2020 it was 35)!
Over 120 adult burrowing owls were observed in Santa Clara County this year (in 2020 it was 35)!
December 16, 2025 at 5:03 PM
Having once reached the verge of local extinction, Bay Area burrowing owls are making a comeback thanks to POST, Santa Clara Valley Habitat Agency, Santa Clara Valley Open Space Authority, and Talon.
Over 120 adult burrowing owls were observed in Santa Clara County this year (in 2020 it was 35)!
Over 120 adult burrowing owls were observed in Santa Clara County this year (in 2020 it was 35)!
This summer, the Tri-Valley Conservancy protected 1,168 acres in Doolan Canyon through a conservation easement.
This was a major conservation victory for the Diablo region, protecting land in a key Diablo Range wildlife corridor.
This was a major conservation victory for the Diablo region, protecting land in a key Diablo Range wildlife corridor.
New 1,168 Acre Conservation Easement Established in Doolan Canyon — Tri-Valley Conservancy
We are proud to announce the largest conservation easement in our organization’s history! We are now permanently protecting an additional 1,168 acres in Doolan Canyon.
www.trivalleyconservancy.org
December 15, 2025 at 5:03 PM
This summer, the Tri-Valley Conservancy protected 1,168 acres in Doolan Canyon through a conservation easement.
This was a major conservation victory for the Diablo region, protecting land in a key Diablo Range wildlife corridor.
This was a major conservation victory for the Diablo region, protecting land in a key Diablo Range wildlife corridor.
The final decision in our lawsuit against the city of Dublin has been made—we won! The open space between Dublin and Livermore remains protected, the Dublin Urban Limit Line will remain intact, and the Crosby property can’t be developed commercially.
Final Decision—We Won in Dublin!
Despite Objections from the City of Dublin, Judge Finalizes Decision, Defending Open Space between Dublin and Livermore DUBLIN, CA—After a hearing on the tentative decision on November 13, 2025, at…
savemountdiablo.org
December 12, 2025 at 5:03 PM
The final decision in our lawsuit against the city of Dublin has been made—we won! The open space between Dublin and Livermore remains protected, the Dublin Urban Limit Line will remain intact, and the Crosby property can’t be developed commercially.
Happy International Mountain Day! Mountains have deep meaning to people, including here in the Bay Area. On Pearl Harbor Day, people look to Mount Diablo to see the Beacon be lit in honor of our veterans.
📸: Ted Clement
📸: Ted Clement
December 11, 2025 at 5:02 PM
Happy International Mountain Day! Mountains have deep meaning to people, including here in the Bay Area. On Pearl Harbor Day, people look to Mount Diablo to see the Beacon be lit in honor of our veterans.
📸: Ted Clement
📸: Ted Clement
Our Mangini Preserve pollinator gardens are thriving!
Our team spotted this hummingbird enjoying the California fuchsia at our Mangini Preserve just the other day.
California fuchsia (Epilobium canum) is one of the native plants that we've planted in our pollinator gardens.
📸: Sean Burke
Our team spotted this hummingbird enjoying the California fuchsia at our Mangini Preserve just the other day.
California fuchsia (Epilobium canum) is one of the native plants that we've planted in our pollinator gardens.
📸: Sean Burke
December 10, 2025 at 5:05 PM
Our Mangini Preserve pollinator gardens are thriving!
Our team spotted this hummingbird enjoying the California fuchsia at our Mangini Preserve just the other day.
California fuchsia (Epilobium canum) is one of the native plants that we've planted in our pollinator gardens.
📸: Sean Burke
Our team spotted this hummingbird enjoying the California fuchsia at our Mangini Preserve just the other day.
California fuchsia (Epilobium canum) is one of the native plants that we've planted in our pollinator gardens.
📸: Sean Burke
Good news for nature! A new study found that recorded extinctions peaked ~100 years ago, especially for plants and some animals. We may be able to avoid the worst of our mass-extinction fears.
➡ www.wienslab.com/Publications_files/Saban_Wiens_PRSL_2025.pdf
📸: Scott Hein
➡ www.wienslab.com/Publications_files/Saban_Wiens_PRSL_2025.pdf
📸: Scott Hein
December 9, 2025 at 5:02 PM
Good news for nature! A new study found that recorded extinctions peaked ~100 years ago, especially for plants and some animals. We may be able to avoid the worst of our mass-extinction fears.
➡ www.wienslab.com/Publications_files/Saban_Wiens_PRSL_2025.pdf
📸: Scott Hein
➡ www.wienslab.com/Publications_files/Saban_Wiens_PRSL_2025.pdf
📸: Scott Hein
Please make a gift for the mountain to help us continue our conservation momentum through next year, and beyond.
Because of you, Save Mount Diablo and its partners have nearly tripled the size of Mount Diablo State Park since 1971. Thank you!
savemountdiablo.org/donate
📸: @heinphoto.bsky.social
Because of you, Save Mount Diablo and its partners have nearly tripled the size of Mount Diablo State Park since 1971. Thank you!
savemountdiablo.org/donate
📸: @heinphoto.bsky.social
December 8, 2025 at 5:05 PM
Please make a gift for the mountain to help us continue our conservation momentum through next year, and beyond.
Because of you, Save Mount Diablo and its partners have nearly tripled the size of Mount Diablo State Park since 1971. Thank you!
savemountdiablo.org/donate
📸: @heinphoto.bsky.social
Because of you, Save Mount Diablo and its partners have nearly tripled the size of Mount Diablo State Park since 1971. Thank you!
savemountdiablo.org/donate
📸: @heinphoto.bsky.social
Chinook salmon have now been spotted in the upper Alameda Creek watershed!
This is the first time the salmon have accessed this area of their own accord since the 1950s, says CalTrout.
📸: Chinook salmon by Dan Sarka
www.sfgate.com/local/articl...
This is the first time the salmon have accessed this area of their own accord since the 1950s, says CalTrout.
📸: Chinook salmon by Dan Sarka
www.sfgate.com/local/articl...
December 5, 2025 at 5:04 PM
Chinook salmon have now been spotted in the upper Alameda Creek watershed!
This is the first time the salmon have accessed this area of their own accord since the 1950s, says CalTrout.
📸: Chinook salmon by Dan Sarka
www.sfgate.com/local/articl...
This is the first time the salmon have accessed this area of their own accord since the 1950s, says CalTrout.
📸: Chinook salmon by Dan Sarka
www.sfgate.com/local/articl...
Enjoy spectacular views of Los Vaqueros Reservoir as well as the serene solitude that only nature can provide on the Cañada Trail.
This short and beautiful trail is a gateway into the Mount Diablo region's wilderness and provides an excellent challenge.
📸: Karen Bakar
This short and beautiful trail is a gateway into the Mount Diablo region's wilderness and provides an excellent challenge.
📸: Karen Bakar
December 4, 2025 at 5:02 PM
Enjoy spectacular views of Los Vaqueros Reservoir as well as the serene solitude that only nature can provide on the Cañada Trail.
This short and beautiful trail is a gateway into the Mount Diablo region's wilderness and provides an excellent challenge.
📸: Karen Bakar
This short and beautiful trail is a gateway into the Mount Diablo region's wilderness and provides an excellent challenge.
📸: Karen Bakar