Mount Sopris Summit Trail is a premier hiking destination in Carbondale, Colorado, covering 12.5 miles with 4600ft of elevation gain. Stats: 12.5 miles, 4600ft gain, Hard. Type: Out-and-Back. Surface: Dirt/Rock. Time: 8-10 hours. Fee: Free. Dogs: Yes. Permit: No. Wildlife: elk, mule deer, black bears, marmots, golden eagles, ptarmigan. Best seasons: Late June through September; visible from Aspen and Carbondale — a dominant Roaring Fork Valley landmark. Mount Sopris at 12,965 feet is the most prominent peak visible from the Roaring Fork Valley. The demanding summit climb rewards with extraordinary views of the Elk Mountains, Mount Daly, and Capitol Peak. Pack plenty of water — desert and high-altitude trails demand more hydration than you expect. Layers are essential above 10,000 feet. Leave No Trace: stay on designated trails, pack out all waste, and respect wildlife and other visitors.