2023 Map of Nasja Mesa

About this map

Lake Powell dominates the landscape of this southern Utah region, where the flooded canyons of the Colorado River meet the San Juan River at their dramatic confluence. The geography is defined by the high, flat-topped Nasja Mesa and the surrounding labyrinth of deep drainages including Reflection Canyon, Anasazi Canyon, and Hidden Passage Canyon. Within the Glen Canyon National Recreation Area, the map documents specific landmarks such as Twilight Arch and Register Rock, providing a detailed view of the modern shoreline as it winds through the prehistoric geology of Glen Canyon. The boundary between Kane and San Juan Counties follows the path of the original river channels, now submerged beneath the fluctuating waters of the reservoir, while terrestrial features like Fifthymile Point and Navajo Valley remain prominent above the water line.