Lake Sonoma Trail Races / organiser
Lake Sonoma 100K
Healdsburg, California, United States
10 Apr 2027
Confirmed
Open
A Western States qualifying 100K, 50K and women's half marathon around Lake Sonoma in California wine country on April 10, 2027.
Train for this raceAbout
The Lake Sonoma 100K starts with a climb up Pritchett Peak, then drops to the Lake Sonoma Visitor Center and follows the old Lake Sonoma 50 mile course out and back. It has 13 aid stations and is relentlessly hilly.
Finishing under 19 hours qualifies runners for Western States 2028.
Distances
| Name | Distance | Gain | Loss | Vert / km | Min altitude | Max altitude | Start | Start location | Finish | Course | Cutoff | Terrain | Technicality | Aid stations | Badges | Entry fee |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake Sonoma 100K | 99.9 km | — | — | — | — | — | 10 Apr 2027 | Healdsburg | Healdsburg | Loop | — | Mountain | — | — | — | — |
| Lake Sonoma 50K | 50 km | — | — | — | — | — | 10 Apr 2027 | Healdsburg | Healdsburg | Loop | — | Mountain | — | — | — | — |
Lake Sonoma 100K terrain notes
Hilly California singletrack with a sunrise summit on Pritchett Peak.
Lake Sonoma 50K terrain notes
Rugged California singletrack.
Registration
- Status
- Open
Links
Notes
Registration closes Apr 9, 2027.