Prepare for an unforgettable journey through Missouri's challenging single track at the Double Chubb, returning on March 28, 2026, in St. Louis, MO. This beloved event, organized by the St. Louis Ultrarunners Group, offers distances of 50K, 25K, and an 8M race, ensuring a fitting challenge for every trail enthusiast. Runners will navigate the popular Chubb Trail within West Tyson County Park, encountering a diverse landscape that transitions from gravel service roads to technical, rocky, and rooty single track, alongside scenic stretches along the Meramec River. The course features rolling hills with significant elevation gains, approximately 1,500 feet per 15.5-mile loop for the 50K, which tackles two such loops for a total of around 3,000-4,000 feet of climbing. Look out for local wildlife like deer and turkey as you traverse this captivating terrain.

The Double Chubb is renowned for its gritty and challenging nature, promising an engaging race experience. Aid stations, stocked with typical ultra fare like Gatorade, water, pretzels, bananas, chips, cookies, and boiled potatoes, are strategically placed approximately every four miles to keep you fueled. Remember, this is a cup-free race, so bring your hydration system for refills. While typical race day conditions in late March offer pleasant highs around 63F and lows near 41F with an 18% chance of precipitation, be prepared for potentially muddy or slick sections, as the course can be affected by rain. Adding to the excitement for 2026 is the new 25K RUCK event, where participants carry a minimum of 20 pounds, adding an extra layer of grit to the already formidable course.

Starting and finishing near the entry gate of West Tyson County Park, the Double Chubb is celebrated not just for its demanding trails, but also for its vibrant atmosphere, good food, and live music, fostering a strong sense of community among participants. Whether you're a seasoned ultra-runner or looking to push your limits on the trails, the Double Chubb offers a rewarding and memorable experience on some of Missouri's finest running grounds.