The Geophysical Sno-Park is named for the nearby national geophysical observatory. The trails traverse gently sloping land forested with pines and firs. The trails are machine groomed with tracks and skate lanes and range in difficulty from easiest to advanced. Snowshoeing, hiking, and dogs are not allowed on the groomed trails in the winter season. A Sno-Park pass is required to park at the trailhead.