Spearfish is ideally located at the intersection of two major United States highways. Our community is situated on Interstate 90, the longest Interstate Highway in the United States. Connecting Seattle with Boston, a major percentage of US commerce travels this route each day. On a north-south axis Spearfish is also located on U.S. Hwy 85, known as the Can-Am highway. Connecting Southern Canada with El Paso, TX, it passes through major commerce centers in Wyoming, Colorado, New Mexico and Texas. Highway 85 carries a large volume of energy industry-related traffic from the oil fields in the north to processing centers southward.