Hallam Lake: Aspen's Nature Sanctuary

Hallam Lake, a serene 25-acre nature preserve and environmental learning center, is located just steps from downtown Aspen. As the original site of the Aspen Center for Environmental Studies (ACES), Hallam Lake has been providing immersive programming for all ages since 1968. The property was donated by Elizabeth Paepcke in 1968. Visitors can explore a half-mile loop nature trail that meanders through wetlands and aspen forests, with observation decks offering views of local wildlife. The preserve is home to a variety of animals, including mule deer, elk, foxes, coyotes, and beavers, as well as golden eagles, hawks, and songbirds. In addition to its natural beauty, Hallam Lake has a rich history, once serving as a cultural center with an ice-production facility, dance hall, and toboggan run. Today, Hallam Lake continues to offer environmental education and naturalist programs year-round. Summertime brings wildflowers, while winter is ideal for tracking animals. The site also features an indoor trout stream with native cutthroat trout. ACES also rehabilitates birds of prey, so visitors can sometimes see great horned owls and golden eagles.