2020 Map of Half Moon Canyon

About this map

The Big Snowy Mountains dominate this central Montana landscape, where the high ridges of the Lewis & Clark National Forest meet the plains of Fergus and Golden Valley counties. This terrain is defined by dramatic vertical relief, reaching its height at Greathouse Peak and the prominent summit of Old Baldy. The map reveals a complex network of drainage systems, including the headwaters of the E Fork Big Spring Cr and Swimming Woman Cr, which have carved deep cuts like Stovepipe Canyon and North Horsethief Canyon into the limestone uplift. Access to this high country is marked by historic transit points such as Half Moon Pass and the rugged line of Knife Blade Ridge. On the lower slopes, the transition to ranching country is evident near Bowmans Bench and along Half Moon Ranch Rd.