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California Fall Classic at Lake Sonoma

Healdsburg, United States • 18 Oct 2025

Event details

The California Fall Classic at Lake Sonoma takes place Saturday, October 18, 2025, in Healdsburg, California (3227 Stewarts Point-Skaggs Springs Rd). The weekend includes two race distances:

  • 100K
  • 55K

Registration for the event closes Wednesday, October 15 at 11:59 PM PT. The event is part of the Lake Sonoma Race Series and the weekend includes on-site camping, live music, and local food and beverage options.

Course and support

The courses run on miles of single track with views of Lake Sonoma and surrounding wine country during harvest season. The 100K is a Western States Endurance Run 2026 qualifier with an 18-hour cutoff. The 55K shares the same overall time limit as the 100K. For the 100K there are five full aid stations and three water stations, with no more than seven miles between aid at any point. The 55K has five full aid stations and two water stations. Cutoffs will be enforced at Lone Rock, Little Rock, Madrone Crosscut, and Warm Springs Aid Station for runner safety. Proceeds from the race series support 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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