Cartographic Archive
A searchable database of historical, topographic, and custom maps of the Colorado River system.
1869 Powell Expedition Map
The original map drafted during John Wesley Powell's pioneering exploration down the Green and Colorado Rivers, noting the naming of Glen Canyon.
1923 USGS River Survey Plan
Comprehensive topographic river plan sheets detailing Glen Canyon from Lees Ferry to the San Juan River. Extremely accurate pre-dam elevation contours.
USGS Glen Canyon Recreation Area (1985)
Official 7.5-minute series quadrangle displaying Lake Powell at its peak operating level of approximately 3700 feet. Showcases surrounding canyon rims.
USGS Bullfrog Basin Topographic Map
Modern digital topo map updating roads, facilities, and the changing contours of Bullfrog Basin, Hall's Creek, and surrounding plateaus.
Wahweap to Bullfrog Side Channels
John's custom route map detailing slot canyons, accessible narrows, and campsites between Wahweap Bay and Bullfrog Basin, adjusted for lower water levels.
Slot Canyon Grid: Escalante River Arm
A specialized overlay guide mapping the intricate slot canyons and historical archaeological ruins of the lower Escalante River canyons.