Metropolitan and Micropolitan areas near Onion Valley Trail, Boise County, Idaho Onion Valley Trail Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Onion Valley Trail, Boise County, Idaho Nearest metro area is Boise City-Nampa, Idaho Click here for more outdoors activities near Boise City-Nampa, Idaho General Camping Information List of nearby metros and micros: Boise City-Nampa, Idaho, 47 miles away Mountain Home, Idaho, 55.2 miles away Ontario, Oregon-Idaho, 112.6 miles away Twin Falls, Idaho, 122.4 miles away Lewiston, Idaho-Washington, 129.5 miles away Moscow, Idaho, 144.1 miles away La Grande, Oregon, 160 miles away Burley, Idaho, 166.8 miles away Pullman, Washington, 176.3 miles away Missoula, Montana, 186.4 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to Idaho Outdoors Index