National Parks near Calypso Trail, Prairie County, Montana Calypso Trail Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Calypso Trail, Prairie County, Montana Nearest metro area is Gillette, Wyoming Click here for more outdoors activities near Gillette, Wyoming General Camping Information List of nearby National Parks: Devils Tower National Monument, Devils Tower - WY, 110.3 miles away Theodore Roosevelt National Park, Medora - ND, 140.8 miles away Little Bighorn Battlefield National Monument, Crow Agency - MT, 148.5 miles away Bighorn Canyon National Recreation Area, Fort Smith - MT, 177.4 miles away Jewel Cave National Monument, Custer - SD, 192.7 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to Montana Outdoors Index