The Crested Butte Ultra 50 Mile takes runners through Colorado's Gunnison National Forest in late September, when fall colors compete with the big mountain views for attention. Starting and finishing at 8,800 feet, the course climbs to over 11,000 feet with roughly 8,300 feet of total elevation gain, moving through varied terrain from wildflower meadows at lower elevations to exposed ridgelines near treeline. The route follows primarily singletrack trails through mountain meadows and up to high ridges, offering the kind of wide-open views Colorado is known for. Runners pass through different ecological zones as they climb and descend, with shade becoming limited at higher elevations. Seven aid stations are positioned throughout the course, including drop bag access at mile 29.5 and 41, though this is a cupless event requiring runners to carry their own reusable cup. This race suits runners comfortable with sustained climbing at altitude and variable mountain weather in late September. The elevation and technical terrain demand respect, while the scenery provides motivation during the longer climbs. Runners who enjoy high-altitude challenges and don't mind cooler fall temperatures will find plenty to appreciate, though those sensitive to altitude or preferring flatter, faster courses might want to look elsewhere.