Three Mile Campground offers 21 hard-sided RV/trailer sites along the North Fork Shoshone River, just 3 miles from Yellowstone's east entrance, making it an excellent base for fishing and outdoor recreation.

Each site includes a picnic table, fire ring, and bear box, with potable water and vault toilets available; note that tents are prohibited due to grizzly bear activity.

The campground operates first-come, first-served with a 16-day stay limit and charges $20 per night for single sites, with some sites offering direct river access.