Floating TexasSan Marcos River
About San Marcos River
The San Marcos River originates from San Marcos Springs, one of the largest spring systems in Texas. The river maintains a constant temperature of 72°F year-round, making it a popular destination for swimming, tubing, and paddling in the college town of San Marcos.
Today's read
Good on the San Marcos River
San MarcosWater is below ideal but still usable in places. Expect shallow spots, slower sections, and some walking depending on your route.
Good
Updated Jun 7, 7:45 PM
Flow
89 cfs
Height
3.87 ft
Updated
Jun 7, 7:45 PM
Trends
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River Map
Loading river schematic.
Current Conditions
San Marcos Springs
Updated Unknown
Flow
N/A
Height
N/A
San Marcos
Updated Jun 7, 7:45 PM
Flow
88.7 cfs
Height
3.87 ft
Above average
Safety Notes
Glass containers are prohibited. Some sections have strong currents after heavy rains. Watch for wildlife including turtles and fish.
Seasonal Info
The San Marcos flows year-round at 72°F, making it swimmable even in winter. Summer is peak season with heavy use on weekends.
Access Points (7)
Rio Vista Park
Popular city park on the San Marcos River featuring a dam that creates a series of rapids. Great for swimming, kayaking, and watching paddlers navigate the chutes.
San Marcos City Park
Large city park with excellent San Marcos River access. Features swimming areas, fishing spots, and connections to the extensive Lions Club tubing route.
Sewell Park
Located on the Texas State University campus at the headwaters of the San Marcos River. Popular swimming spot near the springs where the river emerges.
Lions Club Tube Rental
Non-profit tube rental operation that has served San Marcos since 1978. All proceeds support local community programs. Put-in location for the popular city tube route.
Thompson's Island
Natural island in the San Marcos River popular for swimming and as a rest spot during tube floats. Accessible only by water.
Cape's Dam
Historic low-head dam on the San Marcos River, a popular swimming hole and scenic stop along the river trail. Calm water above the dam and small chutes below.
Pecan Park (Martindale)
Downstream tube outfitter and put-in in Martindale, about 12 miles southeast of San Marcos. Quieter, more scenic floats with shallow, family-friendly water through cypress-lined banks.
Official Paddling Trails (1)
TPWD-certified paddling trails on the San Marcos River.
Nearby Cities
San Marcos, Austin, New Braunfels