Lake Sonoma 100K & 50K

Experience the ultimate blend of rugged ultra running and scenic wine country beauty at the Lake Sonoma 100K & 50K event. Taking place on April 11, 2026, amidst rolling hills and oak-dotted ridgelines overlooking the lake, this race offers a Western States-qualifying 100K, a challenging 50K, and a Trail Sisters Women's Half Marathon. Runners will tackle demanding climbs, forested singletracks, and picturesque lakefront paths, supported by well-equipped aid stations and a warm community spirit. From the sunrise summit to the post-race celebration, participants can expect a rewarding experience complete with custom finisher gifts and post-race pizza. Don't miss out on this unforgettable event that promises a perfect mix of competition and camaraderie in the heart of wine country.