2017 Map of Big Grassy

About this map

Targhee National Forest encompasses this high-elevation landscape in eastern Idaho, where the geological footprint of the Island Park Caldera transitions into a network of ridges and canyons. The terrain is defined by prominent elevations such as Black Mtn and Snow Creek Butte, overlooking a series of drainage basins including Survey Draw and Flat Canyon. A complex hydrologic system feeds the region, with the S Fork Split Creek and Partridge Creek systems carving through the timbered terrain. The presence of numerous designated survey blocks, labeled PB 39 through PB 50, indicates the structured management of these public lands. This 2017 survey shows the intricate system of forest access routes like Big Grassy Spur 2 and Fish Creek Spur 20A that facilitate movement through the dense forest and across the high plateaus of Big Grassy.