2020 Map of Granite Pass

About this map

The high Bitterroot Divide forms the backbone of this survey, where the state line between Montana and Idaho follows the winding crest of the mountains. This rugged high-altitude landscape is dominated by the massive tracts of the Lolo National Forest and the Clearwater National Forest, meeting at the narrow gap of Granite Pass. The drainage patterns here are sharply defined by the terrain, with waters like the Crooked Fork and Boulder Cr carving deep valleys away from the peaks. Prominent high points such as Granite Peak, Pilot Knob, and Rocky Peak stand as sentinels along the ridgelines, marking the boundary between Missoula, Clearwater, and Idaho counties. This map serves as a detailed record of the forest service infrastructure and natural hydrology in a remote region of the American Northwest.