Commercial Building in Prime Mammoth Spring, Arkansas Location - Surrounded by a number of businesses, right off Main Street and across U.S. Hwy 63 from Mammoth Spring State Park. This piece of commercial property has a ton of potential. You can Access this property from U.S. Hwy 63 and/or Main Street Mammoth Spring. Contact Jason 870-847-5846 for complete details. Commercial building & land in Mammoth Spring, Fulton County, Arkansas.