2014 Map of Jefferson Island

About this map

The confluence of the Boulder River and Jefferson River defines the landscape of this southwestern Montana corridor, where the settlements of Cardwell and Jefferson Island sit at the intersection of river life and mountain terrain. The map reveals an intricate network of water management, with numerous ditches like Parrot Ditch and Agricultural Ditch channeling water across the valley floor. Evidence of the region's ranching and transit history is found in family-named routes such as McKeown Ln and Armstrong Rd, while the southern reaches rise into the Deerlodge National Forest. Elevated landmarks including Cave Mtn and London Peak overlook the Summit Valley, providing a detailed picture of the physical boundaries that shaped local development from the river bottoms to the higher pastures of the London Hills.