Stillwater Canyon is a long, winding canyon in Canyonlands National Park in southeastern Utah that follows the Green River along the boundary between Wayne and San Juan counties. Beginning at Bonita Bend in the central park, it extends south as the river meanders through the canyon. From its head, the canyon runs just west of the White Rim, tracing the Green River to the place where both join the Colorado River in the southeastern part of the park. As part of one of the park’s major river corridors, it contributes to the broad canyon landscape that defines Canyonlands.