In 1973, South Mountain gave rise to Wildlands’ mission as the organization’s first land acquisition. The preserve boasts more than 350 acres of woodland trails, pronounced rocky outcroppings and unique vistas in an otherwise urban landscape. South Mountain Preserve is considered part of the 750-acre Robert Rodale Reserve, one of the most important natural areas in the Lehigh Valley. Unique geology, mining and farming history, wetland and successional forests and abundant wildlife make this preserve a popular destination for hiking, mountain biking, walking, bouldering and bird watching. Safe access is available at the Alpine Street Trailhead, on Alpine Street, or the Robert Rodale South Mountain Gateway Trailhead on Klines Lane. The preserve is open to the public from dawn to dusk.