Glen Helen is a 1000-acre nature preserve and environmental education facility which is safeguarded as a place for the observation, study, and enjoyment of natural ecological processes. Scenic features include valleys, ledges, potholes, the Cascades, and the Yellow Spring, from which the village gets its name. A 250-acre parcel within the Glen has been designated as a "National Natural Landmark" by the National Park Service. The State and National Scenic Little Miami River flows through the southern area of Glen Helen. Hiking trails in Glen Helen are open to the public year round from dawn until dusk.