Healdsburg, CA
Join us in Healdsburg, California, April 11th 2026 for the the TERREX Lake Sonoma 50 Mile, Marathon, and Trail Sisters Half Marathon!
The Classic 50 Mile and Trail Sisters (TS) women’s half marathon courses are an out and back style, whereas the marathon course will make a complete loop around Lake Sonoma, crossing the iconic lake bridge. All of the courses boast of “relentless” rolling hills surrounding beautiful Lake Sonoma. Additionally, the out and back courses present an ability to connect with other runners, providing opportunity for high-fives and well wishes.
When it comes to performance, these are perfect events for speedsters looking to test their fitness, and for the first timers who are looking for a challenging, yet encouraging course. We will be providing cash awards for the top three male and female athletes in the 50 mile event!
In true trail community fashion, all three race events start and finish at the Lake Sonoma Visitor Center green space. This festival-like atmosphere is designed for celebration and for fostering community.
Speaking of celebrating, we will have a full schedule of pre and post-race events, including athlete panels, community dinner, socials, and of course wine tastings. You can’t come to Lake Sonoma and not visit a winery!
We hope you will join us for the 50 Mile, Marathon, and TS Half Marathon, April 11th and 12th 2025! We look forward to celebrating with you at that finish line!
Upcoming Races
Apr 11 2026
50 Miles
The course is an out-and-back circumnavigation of the Warm Springs Arm of Lake Sonoma. It is 86% single-track trail and 9% dirt fire roads, with the first 2.4 miles on pavement.
10,500
10,500
ft.
Out and Back
9 Aid
Stations
14:00 Cutoff
4
Elevation Rating
Very hilly, ~7500-12,500 feet in 50 miles
2
Surface Rating
Mostly groomed trail or dirt roads
Additional Distances
This event also has the following sub ultra distances
26.2 Miles
13.1 Miles
Results
50 Miles
View course top times| Date | Finishers | Top Result (M) | Top Result (F) |
|---|---|---|---|
| 04/12/25 | 142 | 6:50:31 | 7:36:21 |
| 04/13/24 | 157 | 6:30:17 | 8:44:11 |
| 04/08/23 | 214 | 6:44:20 | 7:49:27 |
| 04/09/22 | 252 | 7:07:15 | 7:27:15 |
| 09/04/21 | 98 | 7:10:13 | 7:40:20 |
| 04/10/20 | Race Cancelled | ||
| 04/13/19 | 280 | 6:08:31 | 7:25:15 |
| 04/14/18 | 292 | 5:51:16 | 7:13:55 |
| 04/15/17 | 300 | 6:17:55 | 7:22:34 |
| 04/09/16 | 304 | 6:00:52 | 7:14:45 |
| 04/11/15 | 278 | 6:09:39 | 7:08:23 |
| 04/12/14 | 301 | 6:11:10 | 7:26:15 |
| 04/13/13 | 266 | 6:14:55 | 7:47:42 |
| 04/14/12 | 226 | 6:17:27 | 7:52:44 |
| 04/02/11 | Race Cancelled | ||
| 03/27/10 | 144 | 7:08:20 | 8:26:53 |
| 03/28/09 | 111 | 7:30:58 | 8:43:30 |
| 04/12/08 | 75 | 8:24:31 | 9:44:13 |
