Radnor Lake State Park is a 1,368-acre park and is protected as a Class II Natural Area. It is unique due to the abundance of wildlife viewing opportunities, environmental education programs, hiking opportunities and its location in an urban area. The park is day-use only and the 7.75-miles of trail are strictly used for hiking, photography and wildlife observation. Pets, jogging, and bicycles are only allowed on the Otter Creek Road trail. The Lake Trail is accessible to people with all-terrain wheelchairs.
The park is perfect for nature enthusiasts to observe owls, herons, and waterfowl as well as many species of amphibians, reptiles, and mammals such as mink and otter. Hundreds of species of wildflowers, mosses, fungi, ferns, and other plants, as well as trees, shrubs, and vines, add to the natural ecological diversity of the area. Several ranger-led programs are planned throughout the year including canoe floats, wildflower walks, astronomy night hikes, nature hikes, programs on snakes, off-trail land acquisition hikes and birds of prey.
First-time visitors are encouraged to visit the Walter Criley Visitor Center to view interpretive exhibits on the history of the natural area, cultural/historical artifacts, wildlife displays, view a wall-size map of the trail system and/or watch an 18-minute film on how the natural area was saved in the early 1970s.
In 2011, the Historic Valve House Trail opened for park visitors with recently completed interpretive panels focusing on th
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