Popolopen is the name of several related landmarks mainly within the Hudson Highlands of Orange County, New York. These include a mountain, Popolopen Torne—or simply The Torne, and a short and steep-sided nearby valley officially called Hell Hole, but often Popolopen Gorge. Popolopen Creek runs through this valley. The Popolopen Bridge spans its mouth at the Hudson River and is crossed by Route 9W. Popolopen Lake feeds the headwaters of its namesake creek. Despite local usage, the United States Board on Geographical Names recognizes only the lake, creek and bridge as bearing the name Popolopen.