Southwestern Montana From West to East, we will first cover the Phillipsburg to Anaconda area and the area south, which covers the Big Hole River and the Wise River near the communities of Wisdom. From here we will move eastward below Butte to cover the Twin Bridges area. Twin Bridges, Montana is the beginning of the Jefferson River, which is formed by the Beaverhead River, the Wise River and the Ruby River. The Jefferson River heads north and than eastward to Three Forks, Montana. It is at Three Forks, Montana that the Missouri River is formed from the Jefferson River, the Madison River and the Gallatin River to finish the Southwestern Montana section. See maps in the Montana Atlas & Gazetteer Sections 38, 39, 40; 24, 25, 26. Upper Clark Fork River, Warm Springs Wildlife Management and Georgetown Lake Big Hole River Access and Lakes Lakes in the Madison River Area From West Yellowstone to Ennis Hebgen Lake, Quake Lake, Wade Lake and Cliff Lake, Ennis Lake Gallatin River Area Lakes: Lava Lake, Rat Lake Bozeman Area Lakes Hyalite Reservoir, Heather Lake and Emerald Lake