<P> The San Antonio River flows into it just north of Tivoli . Ahead of the entry into the San Antonio Bay estuary, it forms a delta and splits into two distributaries referred respectively as the North and South parts . Each distributary flows into the San Antonio Bay estuary at Guadalupe Bay . </P> <Ul> <Li> <P> The Guadalupe River in Gruene </P> </Li> <Li> <P> The Guadalupe River near Hunt </P> </Li> <Li> <P> The Guadalupe River under Interstate 35 in New Braunfels </P> </Li> <Li> <P> Mouth of the South Guadalupe River at Guadalupe Bay </P> </Li> </Ul> <Li> <P> The Guadalupe River in Gruene </P> </Li> <P> The Guadalupe River in Gruene </P>

Where are the headwaters of the guadalupe river