Bison Bone Reservoir   Be the first to submit input for Bison Bone Reservoir. If you have info on Bison Bone Reservoir, Phillips County, Montana please submit it here to improve this web site.          These outdoors activities are available near Bison Bone Reservoir.   Ski Areas Near Bison Bone Reservoir: Bear Paw Ski Bowl, Montana, 98 miles away       900 foot drop, 2 lifts, 25 runs