1954 Map of Ross Canyon

About this map

The Boulder River carves through this northern Montana landscape, where the irrigation infrastructure of the Sweet Grass Ditch and other unnamed ditches parallels the river's course to support the high ground of McKenzie Flats. The map highlights a distinct transition from the lower river valley to the steep, dissected terrain of the Gallatin National Forest, which covers the southern half of the quadrangle. High-elevation points like Red Mountain and Black Butte overlook a complex network of canyons and gulches, including Ross Canyon and Baker Canyon. Evidence of early industrial activity is found near the center of the sheet at the Calcite Mine (Inactive), while local landmarks such as Eightmile Bridge and Ross Spring indicate the essential role of water access for travelers and livestock in this environment.