2020 Map of Chessman Reservoir

About this map

Rimini sits at the northwestern edge of this landscape, serving as a gateway to the high-country drainage basins of the Helena National Forest and Deerlodge National Forest. The map is dominated by the complex topography of the Continental Divide, centered on the Chessman Reservoir and the headwaters of Tenmile Cr. This area has long been a critical water source for the surrounding region, with the reservoir providing a managed storage point amidst a network of high-elevation meadows and peaks. High-altitude clearings like Frohner Meadows and Black Hall Meadows contrast with the steep slopes of Red Mtn and Lava Mountain. The geography is defined by narrow gulches and creek systems, including Lump Gulch and Nellie Grant Cr, illustrating the rugged drainage patterns that dictated early mountain transit and resource management.