Arapaho Glacier Trail is a premier hiking destination in Nederland, Colorado, covering 6.8 miles with 2100ft of elevation gain. Stats: 6.8 miles, 2100ft gain, Moderate. Type: Out-and-Back. Surface: Dirt/Rock. Time: 4-5 hours. Fee: Free (Boulder County permit). Dogs: Yes. Permit: No. Wildlife: elk, mule deer, marmots, pikas, golden eagles, rosy-finches. Best seasons: Late June through September; the only surviving glacier on the Colorado Front Range. Arapaho Glacier Trail leads to the southernmost glacier in the Rocky Mountains — a remnant ice field that has persisted through centuries of warming. The overlook delivers dramatic views down onto the ice and across the Front Range. 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.