Griffin Pass Reservoir   Be the first to submit input for Griffin Pass Reservoir. If you have info on Griffin Pass Reservoir, Powder River County, Montana please submit it here to improve this web site.          These outdoors activities are available near Griffin Pass Reservoir.   Hotels Near Griffin Pass Reservoir: Holiday Inn Express MILES CITY, Miles City, 36 miles away GuestHouse Inn & Suites Miles, Miles City, 36 miles away Comfort Inn Miles City, Miles City, 36 miles away Super 8 Miles City, Miles City, 36 miles away Econo Lodge Miles City, Miles City, 36 miles away