Lake Sonoma 100K

Lake Sonoma trail events, April 2027

Lake Sonoma hosts a weekend spring trail festival in April 2027 featuring multiple race distances on natural singletrack around Lake Sonoma and its shoreline. The courses pass through Madrone groves, offer summit views from Pritchett Peak on the longest route, and include multiple viewpoints of the lake.

The event program includes three race distances and weekend activities. The 100K is a Western States qualifier when finished in under 19 hours and follows sections of the original 50 Mile out-and-back course. The 50K course includes a crossing of the Lake Sonoma bridge. The Trail Sisters Half Marathon is a women only, point-to-point course that begins at Lone Rock and finishes at the Lake Sonoma Visitor Center; a shuttle returns finishers to Lone Rock and the event uses a five hour finish cutoff.

Race support includes professionally run aid stations staffed by volunteers. Finishers receive a custom bottle of wine from Wilson Winery as the finisher award. Race day parking for the 100K and 50K is in the two large Visitor Center lots; Trail Sisters parking is at Lone Rock. Vehicle and tent camping are allowed in the main parking lot on Friday and Saturday nights. Sacramento International and San Francisco International are listed as airport options for travel. Visit the organization's website for the most recent information.

• 100K Western States qualifier
• 50K includes Lake Sonoma bridge crossing
• Trail Sisters Half Marathon women's only point to point

Events nearby