Greer Spring, Second largest spring in Mark Twain National Forest, Missouri, US
Greer Spring is one of the largest springs in Mark Twain National Forest, releasing roughly 350 million gallons of water each day. The water flows first through a mile-long branch before merging into the Eleven Point River.
Native American tribes relied on this water source for sustenance over many centuries. European settlers arrived later and established their own communities near the spring.
The spring holds National Natural Landmark status because of its geological formations and importance to Missouri's natural heritage. Visitors can observe the distinctive rock structures that shape how water emerges from the ground at this location.
A one-mile trail departs from Highway 19 and leads through the forest to viewing areas near where the water emerges. The path is relatively easy to walk and provides several spots to stop and observe the spring.
This spring is a vital home for a rare species of coldwater crayfish found nowhere else in such abundance in the region. These crustaceans depend on the spring's cool temperature and clean water to survive.
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