Mammoth Spring, Natural spring in Fulton County, Arkansas.

Mammoth Spring is a large natural spring in Fulton County that continuously discharges water and feeds a lake flowing into the Spring River. The site features observation platforms, walking trails, and a museum with information about local water systems.

The spring was a significant water source for regional communities before becoming a tourist destination in the 1800s. A historic railroad station building from that era still stands at the site.

The spring area includes an educational center where visitors learn about water conservation and the regional ecosystem through interpretive programs.

The site is accessible year-round and offers easy paths for all visitors. There are ample areas for walking, relaxing, and picnicking throughout the grounds.

Water from the spring feeds a federal fish hatchery that maintains rare species populations. This breeding program supports fish varieties that struggle to survive in the wild.