This historic freshwater springs site was discovered by the Lewis and Clark Expedition in 1805— it is one of the largest freshwater springs in the world, flowing at a measured 156 million gallons of water per day. This day-use park gives visitors an opportunity to picnic by the Missouri River, visit the fish hatchery and visitor center, walk along the Rivers Edge Trail, view nearby Rainbow Falls overlook, or visit the neighboring Lewis and Clark Interpretive Center operated by the U.S. Forest Service.

The site offers exhibits and occasional recreational and educational events.