Sonoma Fall Classic
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Sonoma Fall Classic : Lake Sonoma, CA (October 17–18, 2026)
The Sonoma Fall Classic is a multi-distance trail running event held at Lake Sonoma and organized by Aravaipa Running in partnership with Healdsburg Running Company. Races take place across two days and use extensive singletrack around the lake, with views of Lake Sonoma and surrounding wine country during harvest season.
Distances offered:
- 100 Mile
- 50 Mile
- Marathon
- Half Marathon
- Relay teams (100 or 50 mile options, four runners per team)
Key course facts include the 100 Mile distance of 100.5 miles with a 36 hour limit and roughly 25,058 ft of elevation gain, the 50 Mile at 51.5 miles with a 16 hour limit and about 10,612 ft of gain, and a trail marathon and half marathon with separate time limits and aid plans. Aid stations and portable toilets are located at multiple points; drop bags are transported to Start/Finish, Warm Springs, and Lone Rock for specified distances. Pacers may be used in the 100 Mile after mile 50 or after dark with restrictions; pacers are not allowed in the 50, marathon, or half. Crew access is available at Start/Finish, Warm Springs, Liberty Glen, and Lone Rock, and participants are advised that there are no gas stations near the course. Free on-site camping is available for registered participants on a first come, first served basis. Bib pickup is scheduled the day before at Healdsburg Running Company. Visit the organization's website for the most recent information.
