Schools in Custer, Montana, the US. Schools locations in Custer, Montana. Find the nearest schools locations, near you. All types of business services School All schools in Custer Custer High School School +1 406-856-4117 304 4th Avenue, Custer, Montana 59024 Write a review Phone Directions Ruff Airport-MT34 School +1 406-856-4164 Custer Frontage Rd, Custer, Montana 59024 Write a review Phone Directions