Discovered by the Lewis and Clark Expedition in 1805 and one of the largest freshwater springs in the world. This is also the site of the Roe River, once listed in the Guinness Book of World Records as the world's shortest river. Giant Springs flows at a 156 million gallons of water per day. The water stays at a temperature of 54 degrees. More than a quarter of a million people, visit Giant Springs State Park each year. Many come to marvel at this remarkable feature, or to view the variety of bird life. Some come to visit the nearby Rainbow Falls Overlook, the visitor center, and the fish hatchery. The Fish Hatchery Program raises about 750,000 fish annually. They are then distributed to areas throughout Montana. A group picnic site is also available.
The visitor center (right across from the roadway from the springs) features taxidermy mounts of grizzly and black bears, educational features on fish and bird recognition, wildlife photographs, and a mini-theater that shows wildlife videos. The visitor center is open Monday through Friday 8:00am - 5:00pm.