Greer Spring is one of the Ozarks' biggest springs

Greer Spring, in the Mark Twain National Forest near the Eleven Point River, is one of the largest springs in the Ozarks and a major source of the river’s flow. Unlike many roadside springs, it is reached by a walk-in trail that descends to the spring branch, so seeing it is a hike rather than a parking-lot view. The spring is the surface outlet of a karst groundwater system, where water moves through dissolved dolomite and limestone, which is what gives it such steady, cold, heavy flow. For visitors the practical point is to plan for the round-trip hike and the climb back out; for landowners the same karst plumbing is a reminder that groundwater here is well connected and worth protecting. The USDA Forest Service manages the Greer Spring tract and is the source for current trail access and rules.