Sonoma Fall Classic
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Sonoma Fall Classic : Lake Sonoma, California
The Sonoma Fall Classic is a multi-distance trail event held at Lake Sonoma on October 17 and 18, 2026. Races take place on singletrack and mixed trail terrain around the lake, with sections that share the same early miles before routes split by course flagging.
Distances
- 100 mile
- 50 mile
- Marathon
- Half marathon
- 100 mile relay (4 person teams)
- 50 mile relay (4 person teams)
Course notes include a notable climb at Pritchett Peaks on the 100 mile route and a two-lap format for the 100 mile course. Key statistics for the 100 mile: 100.5 miles, +25,058 feet elevation gain, 36 hour time limit. The 50 mile lists 51.5 miles and +10,612 feet gain with a 16 hour limit. The marathon and half marathon follow lake loops and point to point sections with specified aid stations.
Flagging colors mark each course: orange for 100 mile and relays, blue for 50 mile, green for marathon, and pink for half marathon. Headlamps are required for 100 mile runners and recommended for 50 mile runners who expect long finishes. Trekking poles are allowed for the 100 mile distance. Drop bags are transported to Start/Finish, Warm Springs, Liberty Glen, and Lone Rock. Free on-site camping is available near the start and finish on a first come, first served basis for registered participants. Visit the organization's website for the most recent information.
