Lehigh Gorge State Park stretches 32 miles along the Lehigh River from the Francis E. Walter Dam in the north to Jim Thorpe in the south, where a deep gorge, steep walls, and rock outcrops shaped by the river form a setting for wildlife, waterfalls, and outdoor recreation including whitewater boating on Class II and III rapids and use of the more than 20-mile non-motorized Lehigh Gorge Trail. In the early 1800s, John James Audubon visited the gorge to paint birds while lumbermen cut huge trees and floated logs as far south as Philadelphia, and by 1841 sawmills lined the landscape between White Haven and Mauch Chunk, present-day Jim Thorpe, supplying lumber for mine supports and canal boats. After anthracite coal was discovered nearby in 1791, the need to move coal and goods south led Josiah White of the Lehigh Coal and Navigation Company to hire Edwin A. Douglas to build the Upper Grand Section of the Lehigh Canal, a slackwater navigation system that overcame a 600-foot drop in elevation from White Haven to Mauch Chunk with 29 locks and 20 dams and mule-drawn canal boats, until severe flood damage in 1862 led to its abandonment in favor of railroads. Remnants of those early industries still dot the gorge.