Mammoth Spring is a very large and is the largest spring in the state of and the 3rd largest spring within the region. It is located in Mammoth Spring State Park, The spring's large volume of water travels a few hundred feet before merging with the to form the headwaters. The cold water provides excellent trout fishing conditions in addition to ample water for float trips on the Spring River. It was declared a natural landmark in June, 1972.Early nineteenth century settlers in the Mammoth Spring area formed a village known as 'Head of the River. Local folklore claims that the spring first emerged when an Indian chief was digging the grave of his son who had been killed while searching for water during a severe drought. Legend holds that the massive spring will flow forever because the young Indian brave had died while searching for water.