2014 Map of Castle Reef

About this map

Lewis & Clark National Forest dominates this landscape, where the Front Range meets the plains of the Teton and Lewis and Clark County line. The dramatic elevation changes are centered on Castle Reef and Grass Hill, with steep drainages such as Hannan Gulch and Green Timber Gulch carving through the limestone formations. Water management is a primary feature of the lower elevations, where the Pishkun Canal diverts water along the base of the mountains toward the Sun River. This irrigation infrastructure, including the Pishkun Canal Rd, highlights the transition from protected wilderness to the managed agricultural lands of the Alkali Flat. Remote drainages like Richardson Cr and No Business Cr underscore the isolated nature of these headwaters before they emerge from the forest boundary into the open Montana basin.