Lace-up for an unforgettable trail experience at the Lake Sonoma 100K & 50K, hitting the scenic routes of Healdsburg, CA, on April 11, 2026. This iconic event, deeply rooted in ultra-running history, offers a challenging yet breathtaking journey through Northern California's wine country. Runners will navigate primarily singletrack trails, often described as "buttery California carpet," winding through oak-dotted ridgelines, madrone groves, and along picturesque lakefront paths, all while delivering outstanding views of Lake Sonoma. Be prepared for "relentless" rolling hills and "punchy" ascents and descents that demand both mental and physical stamina, providing a truly rewarding challenge. Typical race day conditions in early April feature comfortable highs around 69°F and lows of 43°F, with a low chance of precipitation, creating ideal running weather.

The 100K, a highly coveted Western States Endurance Run qualifier, begins with a demanding climb up Pritchett Peak, greeting runners with stunning sunrise summit views before embarking on a relentlessly hilly and remote course with approximately 15,000 feet of elevation gain. The equally rugged 50K, with roughly 5,700 feet of elevation gain, delivers a taste of these challenging trails, including a memorable crossing of the scenic Lake Sonoma bridge. For those seeking a shorter but equally inspiring adventure, the women's-only Trail Sisters Half Marathon offers a supportive atmosphere and rolling terrain with beautiful lake overlooks. All distances are cupless, requiring runners to carry their hydration, while well-stocked aid stations with cheerful volunteers, Skratch Labs products, and traditional ultra fare ensure support throughout the journey.

Starting and finishing at the Lake Sonoma Visitor Center (with the Half Marathon beginning at Lone Rock Trailhead), participants can expect a warm, supportive atmosphere and a vibrant post-race celebration, complete with pizza and a custom wine bottle (or non-alcoholic option) for all finishers. The Lake Sonoma Race Series, renowned for attracting one of the most competitive fields in the US, is more than just a race; it's a community event with proceeds benefiting local student scholarships. This blend of fierce competition, stunning scenery, and laid-back wine country hospitality truly makes the Lake Sonoma 100K & 50K a unique and unforgettable experience.