Several free dispersed camping areas surround Stevensville in western Montana, primarily within the Bitterroot National Forest. Bass Lake and Peterson Lake offer backcountry options requiring hikes of 5-7 miles with significant elevation gain. Bass Lake gains approximately 3000 feet over 7 miles with scenic mountain meadows and creek access along the trail. Peterson Lake involves a 5-mile hike with roughly 1700 feet of elevation gain before dropping 800 feet to the lake.
For vehicle-accessible dispersed camping, Blue Mountain Forest Road 365 provides free sites west of the road, though reviews indicate the road is extremely washboarded with sharp rocks that may cause tire damage. Lost Horse Creek offers numerous dispersed sites with established fire rings and vault toilets. A visitor noted, "This is my favorite area for dispersed camping in the area. Lost Horse creek is beautiful." However, others mention heavy traffic to Twin Lakes further down the road and occasional issues with trash left by previous campers. Petty Creek Road provides additional opportunities with easy access from I-90, featuring small sites with fire rings near the creek.