At 8,681 feet, Greathouse Peak is the tallest mountain in the Big Snowies. Vehicles are permitted on Forest Service roads that reach partially to the peak, but the simplest way up is to hike the 6 mi of unmarked trails that zigzag up the slope from Halfmoon Canyon. The main trail, which is only mildly strenuous, doesn't quite make it to the top; to reach the summit, you'll need to hike a few yards off the main path. You'll know you've reached the highest point when you see the two stone cairns. The Judith Ranger Station in Stanford is your best source for Snowies information.
Pack Trail, unknown, Montana, 59479 , United States