The Comal River is the shortest navigable river in the state of Texas in The Unite States. Proclaimed the "longest shortest river in the world" by locals, it runs entirely within the city limits of New Braunfels in southeast Comal County. It is a tributary of the Guadalupe River. The Comal begins at Comal Springs in Landa Park and flows 2.5 miles (4 km) until its junction with the Guadalupe.