To find the flow of the San Marcos River. Find the Guadalupe River System. You can then find the flow of the Upper San Marcos and the flow of the Blanco River (it takes the water about four hours to get from Wimberley to Kyle and another four hours to get from Kyle to our camp). The flow at our camp is the combined flow of the San Marcos and the Blanco Rivers. The flow is given in cfs - which means cubic feet per second. The average flow of the San Marcos river is about 130 cfs. 100 cfs is pretty low. 500 cfs is very good flow (novices have to be very careful which section of river they run) and anything from 1000 cfs up is very high water for experts only. 10,000 cfs means the lower campground sites are underwater, 20,000 puts water in or very close to the bathhouse, and 30,000 means the camp is underwater.
Learn more about the San Marcos River and the Threatened and Endangered Species of the Edward's Aquifer.
Texas rivers have always flowed through the land and lives of the people who depended on them for food, agriculture, recreation and transportation. But now, most of our rivers have been dammed, diverted, polluted, channelized or fenced in. The TRPA was founded in 1989 to promote the safe and wise use of Texas rivers. Won't you join us?