SAN MARCOS, Texas -- The Guadalupe River stretches from the Hill Country to the coast. Now the 10 counties that form the watershed are tied together with a new tour. 

The Guadalupe-Blanco River Authority has placed markers in 10 cities in the 10 counties they serve.

They tell the story of how the rivers shaped the communities.

As settlers arrived in Texas they went where water was plentiful.

Now the stories of the communities they founded are being told. 

"Water's always been the life blood of any community. Communities were founded around water historically and today water provides the life blood for the community in terms of service and supply," said Tommy Mathews with the Guadalupe-Blanco River Authority.

Each informational kiosk has some information about the town as well as a QR code that links to a video telling history of the community. 

San Marcos' marker will be dedicated on Thursday.