Run Lake Sonoma

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Join us in Healdsburg, California, on April 10th, 2027 for the TERREX Lake Sonoma 100k, 50k, and Trail Sisters Half Marathon!

adidas 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 join 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.

10/20/2026

Only 11 more days of our early bird pricing. Sign up early and save! 🌅 🐦

We extended it once already. It ends on the 31st!

Registration link in profile! ☝️

10/16/2026

We’re wishing all the Sonoma Fall Classic 🍂runners all the best! Have a great weekend and enjoy those miles with smiles! 😀

10/13/2026

ICYMI 👀 Our Early Bird pricing was supposed to end today... but we forgot to remind you. Oops! 🙈

Good news: so many of you loved the new lower Early Bird prices that we’re extending them through the end of October 🎉

Come grab your 2028 WSER Qualifier in Northern California for only $250 for the 100k. 50K Lake Loop is $165 and TS Half $95.

We’ll have the same great festival finish line with flowers, food, drinks, and music.

Grab your spot before prices go up on Nov 1. Link in bio! 🔗

adidas Run Lake Sonoma • 100K • 50K • TS Half
Healdsburg, CA • April 10th 2027!

PC: Let’s Wander Productions McKennon Fred Woltman

10/05/2026

adidas Lake Sonoma 2027 is on the calendar! Saturday, April 10 🌿

Three courses. One lake. Swipe to pick your distance:

• 100K: A Western States qualifier. Big miles, big views, and a finish line worth earning.
• 50K Lake Loop: Rolling single-track that hugs the shoreline, with water views around every bend.
• TS Half Marathon: Women’s only! Our favorite way to start (or fall back in love with) trail racing.

Whether you run up Pritchett Peak in the 100k or over the iconic Lake Sonoma bridge in the 50K and Trail Sisters Half Marathon there is the world’s best finish line waiting for you at the bottom of the hill. Complete with flower power and food and drink. You’ll be greeted by Gina, celebrating every runner who crosses the line.

Tag the friend you want next to you on the start line 👇

Registration is open now. Link in bio.

09/29/2026

Registration for the 2027 adidas Lake Sonoma 100K, 50K and TS Half Marathon is NOW OPEN!

Sign up early and save with our new lower early bird pricing! Good through October 12th. Get your Western States Qualifier on the calendar for only $250 in w**e country. Come run a 50k Lake Loop for $150. Our women’s-only Trail Sisters Half Marathon is $95.

Free ⛺️ at the start/finish too!

See you at the lake!

📸 Let’s Wander Productions

09/24/2026

Mark your calendar. Registration for adidas Lake Sonoma opens Monday, 9/28.

The 100K. The 50K. The Trail Sisters Half Marathon. Three ways to start, and one way to finish: in the arms of someone who is very glad to see you, in a beautiful field, with flowers, and good food & drink.

Take advantage of the early bird pricing. It’s the best you’ll get for the event all year.

100k is $250, 50K is $165, TS Half is $95.

Choose a distance, mark your calendar and signup early and save some money!
Registration opens 9/28. Early bird pricing ends 10/12.

See you at the lake!

📸 Let’s Wander Productions

08/06/2026

This is excellent article from Field Mag discussing the question of growth in trail and ultra running. Give it a read!

We are proud that our April TERREX Lake Sonoma 100k, 50k, and Trail Sisters Half Marathon has been highlighted and recognized as a growing event bringing more celebration and meaningful activations to the race experience.

As race directors, Justin and I (Gina 👋) greatly value partners who share a vision that extends past the course into pre and post event activities, local community engagement and support for local businesses. We are grateful for our partnership with adidas TERREX in helping us bring our vision to reality, and we could not pull off this event without our friends from Healdsburg Running Co. and all of our amazing volunteers!

New brand cash is bringing pool parties and DJs to race weekend, and some runners are asking if their sport is leaving its dirtbag roots in the dust

04/16/2026

Visit website homepage for link!

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!

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!

Address

3227 Stewarts Point-Skaggs Springs Road
Geyserville, CA
95441

Website

http://runlakesonoma.com/

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