2020 Map of Triple Crossing Reservoir West

About this map

Triple Crossing Reservoir serves as a primary water source in this corner of Valley County, Montana, where a network of coulees and creeks drains the landscape. The hydrology of the region is defined by the branching systems of Middle Fork Lone Tree Cr and S Fork Lone Tree Cr, along with the S Fork Willow Cr to the south. Small-scale water management is evident through numerous specialized catchments including the Ruins Reservoir, Finn Reservoir, and the diminutive Halfpint Reservoir. Remote access to these drainage basins is maintained by the Triple Cross Access Rd and Stonehouse Rd. The land is characterized by sharp relief features such as Tony Coulee and Short Coulee, which represent the transition from the high prairie into the intricate creek beds that feed the Missouri River watershed.