A short spring run carries species found nowhere else

The San Marcos River starts at Spring Lake rather than gathering slowly from distant tributaries. Edwards Aquifer water rises through the springs, passes beneath the glass-bottom boats, and leaves the lake as a clear river running through San Marcos.

That steady spring water gives rare wildlife a very small home. Texas wild-rice grows in the wild only in the upper San Marcos River. The fountain darter and Texas blind salamander also rely on Edwards water and its springs.

The river is both a town park and a home for rare life. Access can change with water flow, repairs, and habitat work. Use the City of San Marcos river page before a float or swim.