San Antonio River

San Antonio River
Map of the San Antonio River and its associated watershed in South Texas.
Country	US
Basin
Main source	The San Antonio Springs near the University of the Incarnate Word in San Antonio, Texas. 715 ft (218 m)
River mouth	Flows into the Guadalupe River, 10 mi northwest of the San Antonio Bay.
Basin size	934 sq mi (2,420 km2)
Physical characteristics
Length	240 mi (390 km)
Discharge	Average rate: 400 cu ft/s (11 m3/s)

The San Antonio River is a major waterway that originates in central Texas in a cluster of springs in Midtown San Antonio, approximately four miles north of Downtown, and follows a roughly southeastern path through the state. It eventually feeds into the Guadalupe River about ten miles from San Antonio Bay on the Gulf of Mexico. The river is 240 miles long and crosses five counties: Bexar, Goliad, Karnes, Refugio, and Wilson.

The first documented record of the river was from Álvar Núñez Cabeza de Vaca on his explorations of Texas in 1535. The river was later named after San Antonio de Padua by the first governor of Spanish Texas, Domingo Terán de los Ríos in 1691.

On June 13, 1691, Governor Terán and his company camped at a rancheria on a stream called Yanaguana They renamed the stream "San Antonio" because it was Saint Anthony's Day. Father Damián Massanet accompanied Governor Terán on his trip.

During the Texas Revolution, the river was host to several major conflicts. The Battle of Concepcion occurred when the Mexican Forces in Bexar and Texian Militia fired upon each other in a small skirmish on the Mission's grounds. The Grass Fight occurred when Texian Militia mistook mules carrying grass to feed horses as mules carrying supply and gold money. The siege of Bexar was the climax of all these previous events when the Texian Militia surrounded Bexar and began continuous attacks into the Mexican stronghold of Bexar until the Mexican General Martín Perfecto de Cos surrendered.