Aspen Center for Environmental Studies

About

The Aspen Center for Environmental Studies (ACES) operates multiple nature preserves in Aspen, Colorado, including Rock Bottom Ranch, Hallam Lake, and Toklat. These sites offer moderate fall hiking from September through November, with typical visits lasting about two hours. The trails are suitable for hikers with moderate experience and allow pets. Parking is available at the facilities, and restrooms are provided. The area is known for changing aspen leaves and mountain views. ACES also offers naturalist-guided aspen hiking tours and other nature programs.