Today, much of Glen Canyon National Recreation Area remains as Powell saw it nearly 150 years ago, and boats are still the best way to traverse this remote canyon country. But you won’t have to tackle a wild river to do it. The controversial 1963 construction of the 710-foot Glen Canyon Dam tamed the mighty Colorado. Though it drowned the canyon, the dam also created Lake Powell, a truly magnificent body of water. At full pool, the lake is 186 miles long with 1,960 miles of shoreline; last year, that translated to roughly 170 miles of navigable Colorado River channel and 1,800 miles of shoreline. That makes Lake Powell the primary gateway to a startling desert wilderness. Within the arms of its nearly 100 major side canyons are ancient cliff dwellings and petroglyphs, Mesozoic fossils, dinosaur footprints, lush hanging gardens, hidden slots, Seussian rock formations, and sacred Native American sites like Rainbow Bridge.