[1] Originating in the park, Mammoth Spring averages a flow rate of 9,780,000 US gallons (37,000,000 L) per hour of 58 °F (14 °C) water.

Rainfall in southern Missouri percolates into the ground, flows through Grand Gulf State Park and reemerges as Mammoth Spring in Arkansas.

[4] Prior to 1957, the Mammoth Spring Cattle Sales Barn was co-owned and run by local entrepreneur Kenneth "Bert" Bishop and his associate, roughly on the site where the tourist information center now stands.

Local farmers would routinely come to the site to sell livestock and other wares, such as Howard Green, who sold home-made walking sticks.

A short walking trail leads to the restored train depot that formerly provided a connection for the city of Mammoth Spring to the Frisco Railway.