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California Fall Classic at Lake Sonoma

Healdsburg, United States • 18 Oct 2025

The California Fall Classic at Lake Sonoma, held in Healdsburg, CA, offers two challenging ultramarathon distances: 100K and 55K. Set against the stunning backdrop of wine country during harvest season, the courses feature relentless single-track trails with majestic views of Lake Sonoma. The 100K serves as a qualifier for the Western States Endurance Run with an 18-hour cutoff, while the 55K is ideal for first-time ultra runners.

Both races provide generous aid stations spaced no more than seven miles apart to support participants. The event weekend includes on-site camping, live music, and local food and wine, creating a vibrant community atmosphere. Proceeds benefit the Children of Vineyard Workers Scholarship Fund. Visit the organization's website for the most recent information.

United States California Healdsburg

Race information

Website Registration
100 km
100k
55 km
55k
Visit the organization's website for the most recent information.
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