0.06" rain Tue; SW-facing mixed; staying good
421 is a mountain bike trail in the Crested Butte & Gunnison area of Colorado. This page tracks its current riding conditions — whether it's hero dirt, dusty, soft, or too muddy to ride — along with the next several days' outlook and the best time of day to ride, so you can decide before you load up.
Open live map & 7-day forecast → All Crested Butte & Gunnison trails