Lake Sonoma 100K & 50K
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.
Additional Distances
This event also has the following sub ultra distances
Results
50 KM
| Date | Finishers | Top Result (F) | Top Result (M) |
|---|---|---|---|
| 04/11/26 | 218 | 4:19:36 | 3:39:39 |
100 KM
| Date | Finishers | Top Result (F) | Top Result (M) |
|---|---|---|---|
| 04/11/26 | 97 | 10:13:24 | 8:36:09 |
50 Miles
| Date | Finishers | Top Result (F) | Top Result (M) | Top Result (X) |
|---|---|---|---|---|
| 04/12/25 | 142 | 7:36:21 | 6:50:31 | 8:56:38 |
| 04/13/24 | 157 | 8:44:11 | 6:30:17 | |
| 04/08/23 | 214 | 7:49:27 | 6:44:20 | |
| 04/09/22 | 252 | 7:27:15 | 7:07:15 | |
| 09/04/21 | 98 | 7:40:20 | 7:10:13 | |
| 04/10/20 | Race Cancelled | |||
| 04/13/19 | 280 | 7:25:15 | 6:08:31 | |
| 04/14/18 | 292 | 7:13:55 | 5:51:16 | |
| 04/15/17 | 300 | 7:22:34 | 6:17:55 | |
| 04/09/16 | 304 | 7:14:45 | 6:00:52 | |
| 04/11/15 | 278 | 7:08:23 | 6:09:39 | |
| 04/12/14 | 301 | 7:26:15 | 6:11:10 | |
| 04/13/13 | 266 | 7:47:42 | 6:14:55 | |
| 04/14/12 | 226 | 7:52:44 | 6:17:27 | |
| 04/02/11 | Race Cancelled | |||
| 03/27/10 | 144 | 8:26:53 | 7:08:20 | |
| 03/28/09 | 111 | 8:43:30 | 7:30:58 | |
| 04/12/08 | 75 | 9:44:13 | 8:24:31 | |