Run Lake Sonoma

Run Lake Sonoma Join us in Healdsburg, California, on April 11th 2026 for the TERREX Lake Sonoma 100k, 50k, and Trail Sisters Half Marathon!

adidas TERREX will continue as our presenting partner! Join us at Lake Sonoma on Saturday, April 11th, 2026, for our springtime ultra trail festival! Our 100k course is a Western States Qualifier that includes sunrise summit views at the top of Pritchett Peak, stretches of trail through enchanting Madrone groves, all along the OG 50 Mile out and back course. Not quite ready for 100k but eager to j

oin the ultra-distance race club? Our all new 50k course provides a taste of the relentless trails that make Lake Sonoma so enticing and rewarding, with a bonus crossing of the iconic Lake Sonoma bridge. Both courses highlight that buttery California carpet, provide outstanding views of Lake Sonoma, and offer professionally run aid stations from the friendliest volunteers you’ll meet! To top it off, finishers receive a custom bottle of wine from Wilson Winery as their award, functional for a well-deserved celebration! Ladies, in addition to the 100k and 50k we are excited to provide you the Trail Sisters Half Marathon a women’s only race. This fun and challenging race event fosters camaraderie and empowerment through a celebration of participation for first-timers and experienced runners. The point to point course begins at Lone Rock, traversing out and back to the lake, taking runners across the famous Lake Sonoma bridge, concluding at our festival finish line. Trail Sisters race events are known for their supportive environment, and a welcoming field of women providing each other motivation to reach the finish line. Our finish friendly cut off of 5 hours gives everyone the opportunity to cross the finish line. We are proud of our event offerings, but what brings us the most joy is creating a weekend of community connection and celebration. Activities begin on Thursday afternoon with a shakeout run to Coyote Sonoma, athlete panel and community dinner on Friday, and finally a celebration social with wine tastings at Coyote Sonoma on Sunday at noon. We hope you will join us this April at the TERREX Lake Sonoma 100k, 50k or Trail Sisters Half Marathon. Come to enjoy event and accomplish your spring time goals, stay to celebrate and experience what wine country has to offer.

Visit website homepage for link!
04/16/2026

Visit website homepage for link!

And that’s a wrap! The 2026 TERREX Lake Sonoma 100k, 50k, and Half Marathon was a wet one with no shortage of adventure...
04/13/2026

And that’s a wrap! The 2026 TERREX Lake Sonoma 100k, 50k, and Half Marathon was a wet one with no shortage of adventure! True to the motto of being relentless, runners dug deep pushing through adverse weather conditions on this challenging course. We couldn’t have been more proud of everyone who toed the start line on Saturday.

A huge thank you to our amazing team of volunteers and crew! This race does not exist without their dedication and support!

To our partner Adidas TERREX , thank you for helping us to elevate the race experience, and for creating community centric activations so that all attendees can get involved and participate.

Wilson Winery , Skratch Labs , Happy Cat Pizza , Old Caz , Northern Sonoma County Firefighters , Mountain Outpost , Let’s Wander Photography , UltraLive.net , DJ Marco, and Maria Clementi of Dooryard Provisions, THANK YOU for your continued support! You are staples to this event and are forever appreciated!

Results links are posted on RunLakeSonoma.com and photos from Let’s Wander Photography will be available in a few days!

We’re working to get cleaned up and will get photo links up from race day ASAP! Links will be on website homepage once l...
04/13/2026

We’re working to get cleaned up and will get photo links up from race day ASAP! Links will be on website homepage once live!

See you there!
04/12/2026

See you there!

Only a few more days till we party with at Lake Sonoma! Until then, grab your packet Thursday or Friday at along with ...
04/08/2026

Only a few more days till we party with at Lake Sonoma! Until then, grab your packet Thursday or Friday at along with your special gift from adidas at the TERREX trailer. Event festivities begin tomorrow!
•Thurs. 9th:
12-6pm packet pickup @ HRC
6pm - shake out run from HRC to Coyote Sonoma
•Fri. 10th:
12-7pm packet pickup @ HRC
4pm Athlete panel
5pm Pre-race dinner (menu & tix on website) @ HRC
•Sat. 11th:
RACE DAY - 100k, 50k, Trail Sisters Half Marathon!
•Sun. 12th
-12-2pm Celebration Social with complimentary Wilson Winery wine tastings and lite snacks @ Coyote Sonoma

For more details, visit: runlakesonoma.com (link in bio)

Almost wine time! TERREX Lake Sonoma 100k and 50k finishers receive a bottle of Wilson Winery’s finest; NA option availa...
03/29/2026

Almost wine time! TERREX Lake Sonoma 100k and 50k finishers receive a bottle of Wilson Winery’s finest; NA option available as well! Our Trail Sisters Half Marathon finishers receive a commemorative soup/mug (arriving any day now).

Still time to register if you want to join the party! Link in bio!

The Participant Guides are LIVE!April 11th is coming fast! Whether you’re chasing a Western States ticket in the 100K, t...
03/29/2026

The Participant Guides are LIVE!

April 11th is coming fast! Whether you’re chasing a Western States ticket in the 100K, tackling the 50K loop, or running the Trail Sisters Half Marathon, your roadmap to race day is officially here.

Inside the Runner Guides:
📍 Course Maps & Elevation (study those rollers!)
⛽ Aid Station Locations & Fueling
⏰ Start Times & Logistics

Not registered yet? 🏃‍♀️ Don’t wait until the start line is a memory—grab your spot now and join us in the beautiful Healdsburg hills!

🔗 Participants Check Your Email!

(Participant Guide links are on the website homepage and race pages as well)

03/26/2026
Training run! Join the party and preview the course! This Saturday March 28th! Meet at South Lake Trailhead at 8am!
03/24/2026

Training run! Join the party and preview the course! This Saturday March 28th! Meet at South Lake Trailhead at 8am!

The Best Dock Bridge in Trail Running has been installed! Getting the lake ready for the big day on April 11th! High wat...
03/12/2026

The Best Dock Bridge in Trail Running has been installed! Getting the lake ready for the big day on April 11th! High water 💧 Dry shoes 👟. See you at the lake!

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3227 Stewarts Point-Skaggs Springs Road
Geyserville, CA
95441

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