Mammoth Spring Arkansas Real Estate - 1st American Realty, Mammoth Spring, Arkansas, has farms, acreages and homes for sale throughout the Mammoth Spring and Fulton County areas, and other recreational & commercial real estate for sale in Mammoth Spring Arkansas area and throughout the Arkansas Ozarks. We are here to help you with all your real estate needs. Please e-mail us for free information. Strategically located on Hwy 9 and US 63 on the Arkansas-Missouri border, Mammoth Spring is a great resting place for the Ozark traveler. Situated on the shore of nine acres, Mammoth Spring is said to be one of the worlds largest, crystal clear, rainbow trout filled, spring rivers. This fabulous river begins at the big spring and flows southward through the beautiful Ozark Mountains and is one of the best fishing and floating rivers in the nation. Mammoth Spring State Park provides many opportunitites to view the world famous natural spring. A visitor center also features exhibits, brochures, restrooms, and souvenirs. To enhance your visit, you'll enjoy a covered pavillion, walking trail, picnic areas, and a restored train depot. The depot houses exhibits of train memorabilia including a Frisco Caboose and other historical objects of the area.