Harrison left plans and a large bequest for the Soldiers and Sailors Hospital in Wellsboro, which was built only after his death. The state park which bears his name became very popular after a publicity campaign in the 1930s. More than 300,000 tourists visited the canyon by the autumn of 1936, and 15,000 visited Leonard Harrison over Memorial Day weekend in 1937. That year more visitors came to the Pine Creek Gorge than to Yellowstone National Park. In 2003, the park had 142,716 visitors, and Leonard Harrison State Park is part of the twenty-one state parks chosen by the DCNR Pennsylvania Bureau of Parks for its "Twenty Must-See Pennsylvania State Parks" list. Leonard Harrison and Colton Point State Parks are the only two parks treated as one unit for the list. The DCNR describes the parks together, noting how they "offer spectacular vistas and a fabulous view of Pine Creek Gorge, also known as Pennsylvania's Grand Canyon". It goes on to praise their inclusion in a National Natural Landmark and State Park Natural Area, hiking and trails, and the Pine Creek Rail Trail and bicycling. Note: Despite the title, there are twenty-one parks in the list, with Colton Point and Leonard Harrison State Parks treated as one.
