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
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
Thanks to you, we soared to our Giving Tuesday goal!
In the face of mounting development threats and climate change, this work is more necessary than ever.
Every dollar you donated on Giving Tuesday will help Mount Diablo thrive. Thank you.
📸: Sean Burke
In the face of mounting development threats and climate change, this work is more necessary than ever.
Every dollar you donated on Giving Tuesday will help Mount Diablo thrive. Thank you.
📸: Sean Burke
December 3, 2025 at 5:02 PM
Thanks to you, we soared to our Giving Tuesday goal!
In the face of mounting development threats and climate change, this work is more necessary than ever.
Every dollar you donated on Giving Tuesday will help Mount Diablo thrive. Thank you.
📸: Sean Burke
In the face of mounting development threats and climate change, this work is more necessary than ever.
Every dollar you donated on Giving Tuesday will help Mount Diablo thrive. Thank you.
📸: Sean Burke
We are overjoyed to share that as of today, one of Mount Diablo’s last privately owned inholdings is now permanently protected!
Bob Nunn has generously donated the Nunn-Paulsen inholding to Save Mount Diablo in memory of his late father, Ron Nunn.
Bob Nunn has generously donated the Nunn-Paulsen inholding to Save Mount Diablo in memory of his late father, Ron Nunn.
One of the Last Inholdings on Mount Diablo Is Protected by Generous Donation
Bob Nunn Donates “Nunn-Paulsen Inholding” to Save Mount Diablo in Memory of Father, Ron Nunn MOUNT DIABLO, CA— One of Mount Diablo’s last privately owned inholdings, rugged and biodiverse, is…
savemountdiablo.org
December 2, 2025 at 11:17 PM
We are overjoyed to share that as of today, one of Mount Diablo’s last privately owned inholdings is now permanently protected!
Bob Nunn has generously donated the Nunn-Paulsen inholding to Save Mount Diablo in memory of his late father, Ron Nunn.
Bob Nunn has generously donated the Nunn-Paulsen inholding to Save Mount Diablo in memory of his late father, Ron Nunn.
Let's go WILD for Mount Diablo on #GivingTuesday.
Tomorrow, every dollar you give, up to $10,000, will be doubled by two generous donors, Jim and Bette Felton!
This is your chance to make your money go twice as far for nature.
savemountdiablo.org/donate
Tomorrow, every dollar you give, up to $10,000, will be doubled by two generous donors, Jim and Bette Felton!
This is your chance to make your money go twice as far for nature.
savemountdiablo.org/donate
December 1, 2025 at 5:02 PM
Let's go WILD for Mount Diablo on #GivingTuesday.
Tomorrow, every dollar you give, up to $10,000, will be doubled by two generous donors, Jim and Bette Felton!
This is your chance to make your money go twice as far for nature.
savemountdiablo.org/donate
Tomorrow, every dollar you give, up to $10,000, will be doubled by two generous donors, Jim and Bette Felton!
This is your chance to make your money go twice as far for nature.
savemountdiablo.org/donate
Today, we're skipping the Black Friday shopping and getting outside to celebrate #GreenFriday! 🌳⛰
#OptOutside today and check out our online guide to hikes up and down the #DiabloRange: savemountdiablo.org/experience/f...
📸: Scott Hein, Emily Sherwood, and Mary Nagle
#OptOutside today and check out our online guide to hikes up and down the #DiabloRange: savemountdiablo.org/experience/f...
📸: Scott Hein, Emily Sherwood, and Mary Nagle
November 28, 2025 at 5:05 PM
Today, we're skipping the Black Friday shopping and getting outside to celebrate #GreenFriday! 🌳⛰
#OptOutside today and check out our online guide to hikes up and down the #DiabloRange: savemountdiablo.org/experience/f...
📸: Scott Hein, Emily Sherwood, and Mary Nagle
#OptOutside today and check out our online guide to hikes up and down the #DiabloRange: savemountdiablo.org/experience/f...
📸: Scott Hein, Emily Sherwood, and Mary Nagle
Today, we're giving thanks to the extraordinary community who makes Save Mount Diablo's ambitious work possible, to our staff and supporters, and, of course, to Mount Diablo's awe-inspiring wild lands.
📸: Shannon Grover, Laura Kindsvater, Kendall Oei, and Jessamyn Photography
📸: Shannon Grover, Laura Kindsvater, Kendall Oei, and Jessamyn Photography
November 27, 2025 at 5:05 PM
Today, we're giving thanks to the extraordinary community who makes Save Mount Diablo's ambitious work possible, to our staff and supporters, and, of course, to Mount Diablo's awe-inspiring wild lands.
📸: Shannon Grover, Laura Kindsvater, Kendall Oei, and Jessamyn Photography
📸: Shannon Grover, Laura Kindsvater, Kendall Oei, and Jessamyn Photography
Meet California's blue oak (Quercus douglasii)!
Oaks support the largest number of butterflies and moths in North America as a host plant. They are among the best things to plant to support wildlife, including a wide variety of mammals and birds.
📸: Mary Nagle and Laura Kindsvater
Oaks support the largest number of butterflies and moths in North America as a host plant. They are among the best things to plant to support wildlife, including a wide variety of mammals and birds.
📸: Mary Nagle and Laura Kindsvater
November 26, 2025 at 5:04 PM
Meet California's blue oak (Quercus douglasii)!
Oaks support the largest number of butterflies and moths in North America as a host plant. They are among the best things to plant to support wildlife, including a wide variety of mammals and birds.
📸: Mary Nagle and Laura Kindsvater
Oaks support the largest number of butterflies and moths in North America as a host plant. They are among the best things to plant to support wildlife, including a wide variety of mammals and birds.
📸: Mary Nagle and Laura Kindsvater
Badgers like this are still rare in the Mount Diablo region, but thanks to conservation work up and down the Diablo Range, they're coming back.
Your support helps them have a place to return to in the East Bay.
savemountdiablo.org/donate
Photo: Scott Hein
Your support helps them have a place to return to in the East Bay.
savemountdiablo.org/donate
Photo: Scott Hein
November 25, 2025 at 5:02 PM
Badgers like this are still rare in the Mount Diablo region, but thanks to conservation work up and down the Diablo Range, they're coming back.
Your support helps them have a place to return to in the East Bay.
savemountdiablo.org/donate
Photo: Scott Hein
Your support helps them have a place to return to in the East Bay.
savemountdiablo.org/donate
Photo: Scott Hein