LOCATED 5 MILES SOUTH OF BOZEMAN. FROM BOZEMAN, FOLLOW S THIRD FOR 4 MILES TO NASH ROAD. GO EAST ON NASH FOR 1 MILE TO SOURDOUGH CANYON ROAD #979. THE PARKING AREA IS 1 MILE SOUTH ON SOURDOUGH CANYON ROAD.
Mystic Lake is the deepest lake in the Beartooth Mountains. It has the largest sandy beach in the Absaroka-Beartooth Wilderness. The Montana Power Company utilizes the power of this large lake and has a dam present. Mystic Lake supports a rainbow trout fishery. Hiking the three-mile trail up to Mystic Lake provides views of West Rosebud Valley and a few other lakes.