Lake Sonoma 100K
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About the race
Lake Sonoma hosts a springtime trail weekend in April with three race distances and a program of community activities. The event includes a 100K that serves as a Western States qualifier, a 50K that crosses the Lake Sonoma bridge, and the Trail Sisters Half Marathon, a women only point to point race. Course highlights for the 100K include summit views from Pritchett Peak and stretches through madrone groves along the original 50‑mile out‑and‑back route. The 50K and the Trail Sisters Half Marathon both include a crossing of the Lake Sonoma bridge.
The 100K and 50K start and finish at the Lake Sonoma Visitor Center. The Trail Sisters Half Marathon starts at Lone Rock and finishes at the Visitor Center; a shuttle returns finishers to Lone Rock. Aid stations are professionally run and staffed by volunteers. Finishers receive a custom bottle of wine from Wilson Winery as the event award.
Weekend activities begin on Thursday afternoon with a shakeout run, continue with an athlete panel and community dinner on Friday, and conclude with a Sunday social including wine tastings at noon. Logistics noted by the organizer include parking for the 100K and 50K in the visitor center lots, Lone Rock parking for the half marathon, and permitted vehicle and tent camping in the main parking lot on Friday and Saturday nights. Visit the organization's website for the most recent information.
