From Trail Ridge Road, look for elk, marmots, and birds on the tundra. Elk, moose, and deer are most active at dawn and dusk. But bighorn sheep are active all day. So are marmots, squirrels, and chipmunks. Birds are easier to find in early morning.
Beavers work mostly at night.
Ask a ranger about how to find animals. Check the park newspaper for ranger programs that focus on wildlife. To protect wildlife at critical times, parts of the park are sometimes closed to people. The Crater Trail on Specimen Mountain is closed from May through mid-July during bighorn lambing season. This lets sheep move freely from the lambing area to feeding grounds elsewhere.