National Parks near Big I Grade, Owyhee County, Idaho Big I Grade Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Big I Grade, Owyhee 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 National Parks: Hagerman Fossil Beds National Monument, Hagerman - ID, 136.2 miles away John Day Fossil Beds National Monument, Kimberly - OR, 207.4 miles away City Of Rocks National Reserve, Almo - ID, 227.3 miles away Craters Of The Moon National Monument, Arco - ID, 247.9 miles away Great Basin National Park, Baker - NV, 274.2 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to Idaho Outdoors Index