Teton Pass Ski Area is located ~30 miles West of Choteau, Montana.
To get to the ski area, travel NW from Choteau on Highway 89. After 4.5 miles, take a left onto Teton Canyon Rd. Stay straight on Teton Canyon road all the way here. The last 10 miles is on gravel.
Once you leave the pavement you are entering a canyon and will no longer have cell service. Plan accordingly.