Mammoth Spring State Park

Arkansas State Park And National Natural Landmark. One Of The Largest Springs In The United States, Discharging Around Nine Million Gallons An Hour To Form Spring Lake And The Head Of The Spring River. · Mammoth Spring, Arkansas

Mammoth Spring puts out somewhere around nine million gallons an hour, which makes it one of the largest springs in the United States and the largest in Arkansas by a very wide margin. The water arrives at a constant fifty-eight degrees Fahrenheit, having travelled underground from a sinkhole plain in southern Missouri, fills a ten-acre lake in a few minutes and leaves as the Spring River - a full-sized river that begins in a car park. That flow is why the Spring River below the park is floatable and cold all summer when every other Ozark stream has dried to gravel, and why this small town on the Missouri line once had a mill, a hydroelectric plant and a railway. The 1886 Frisco depot is restored as a museum beside the water, the spring is a National Natural Landmark, and the whole thing takes an hour to see, sits on a paved level loop and is free to enter - which makes it the easiest significant natural site in the state to visit.

17 US Highway 63, Mammoth Spring, Arkansas, 72554, United States

The park grounds, the spring, the lake walk and the picnic areas are open daily during daylight hours and Arkansas state parks charge no entrance fee. The restored 1886 Frisco depot museum and the visitor centre keep daytime hours, reduce them in winter and close on major holidays; there may be a small charge for the depot museum. The spring itself runs at the same volume and temperature every day of the year regardless of season or weather. Confirm museum hours before travelling.

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