2016 Map of Twelvemile Mesa

About this map

Dinosaur National Monument defines the southern portion of this landscape, where the Yampa River carves a deep path through the canyonlands of Moffat County. The confluence with the Little Snake River occurs near Lily Park, a central point in a region characterized by dramatic topographical shifts from river bottoms to high elevations like Twelvemile Mesa. The map illustrates a network of drainage systems including Cross Mountain Canyon, Twelve Mile Gulch, and Buffalo Gulch, which have shaped the local geology over millennia. This 2016 survey captures the transition between protected federal lands and the surrounding open territory, marked by remote access routes such as Dinosaur Park Svc Rd and several county roads. The intricate contour lines reveal the complex erosional patterns of the Sawmill Canyon and Calico Draw, providing a clear record of the high-desert terrain.