Metropolitan and Micropolitan areas near Sylvan Lake Harney Trail, Pennington County, South Dakota Sylvan Lake Harney Trail Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Sylvan Lake Harney Trail, Pennington County, South Dakota Nearest metro area is Spearfish, South Dakota Click here for more outdoors activities near Spearfish, South Dakota General Camping Information List of nearby metros and micros: Spearfish, South Dakota, 29.1 miles away Rapid City, South Dakota, 58.9 miles away Scottsbluff, Nebraska, 101.8 miles away Gillette, Wyoming, 135.7 miles away Cheyenne, Wyoming, 158.5 miles away Laramie, Wyoming, 200.7 miles away North Platte, Nebraska, 230.7 miles away Bismarck, North Dakota, 232.7 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to South Dakota Outdoors Index