2017 Map of Big Costilla Peak

About this map

Big Costilla Peak dominates this high-altitude landscape along the border between Taos County, New Mexico, and Costilla County, Colorado. The terrain is defined by a series of glacial features and high alpine basins, including Seven Lakes and Glacier Lakes near State Line Peak. The presence of Costilla Reservoir in the southeast corner indicates a managed water system that captures runoff from tributaries such as Santistevan Cr and Allen Cr. This 2017 survey illustrates the complex drainage patterns of the Sangre de Cristo Mountains, where headwaters like Willow Cr and Jarocito Cr carve through steep canyons. The map serves as a primary reference for the high-country hydrology and topographical boundaries of this remote interstate region.