Paws and Paths: Exploring the Bauer Unit at Guadalupe River State Park is a guided dog walk through the natural beauty of the Bauer Unit in Spring Branch, near San Antonio. Park volunteer Ed and B.A.R.K. Ranger Baxter lead the roughly two-mile hike, so you and your canine companion can enjoy the outdoors together. Along the way you'll pick up local plants, wildlife and geology, with Ed sharing what he knows about the surroundings.