Mary's Wall Campsite is a dispersed camping area located along the Colorado River between Pumphouse and Radium recreation sites, featuring a Class II rapid where the river pushes against a wall on river right—stay away from the wall at all water levels.

The site offers limited shade and accommodates 1-3 tents, with an adjacent historic miner's cabin available for exploration. Access is by boat only, positioned approximately 13. 4-13.

5 river miles from Pumphouse in the scenic Lower Gore/Hartman Canyon section.