2017 Map of Madison Arm

About this map

Hebgen Lake and its prominent Madison Arm dominate this High Rockies landscape near the border of Montana and Idaho. The map details a complex hydrologic network including the South Fork Madison River and various geothermal or freshwater sources like Black Sand Spring and Basin Cabin Spring. In the southern portion of the quadrangle, the Continental Divide winds through the Targhee National Forest and Gallatin National Forest, marking the literal crest of the continent. The area maintains its rural character with legacy ranching infrastructure indicated by Bar N Ranch Rd and Deep Well Ranch Rd, while the Yellowstone Airport provides a modern transit link for the Madison Valley region. Notable local landmarks like Horse Butte and Observation Point offer surveying perspectives over the South Fork Arm, while the small settlement at Slushers Point anchors the northern lakeshore.