Eastward-dipping limestones, sandstones, and mudstones, deposited from approximately 113 million years ago along the shorelines of an ancient sea, form the geological setting for the park area. Over the last million years or so, these layered formations have been dissected and sculpted by the Paluxy River which, in many places, has cut down to resistant beds and planed off sizable exposures of rock in the river bottom. Dinosaur Valley State Park contains some of the best preserved dinosaur tracks in the world. The dinosaur tracks are located in the riverbed, so please call ahead to check on river conditions. There are two fiberglass models; a 70-foot Apatosaurus and a 45-foot Tyrannosaurus Rex. They were built, under commission of the Sinclair Oil Company, New York World's Fair Dinosaur Exhibit of 1964 - 1965. Other activities include camping, picnicking, hiking, mountain biking, horseback riding in a separate 100-acre area (no horses furnished), river swimming and fishing, and wildlife observation. There is a portion of the Texas longhorn herd in the park. There are 7 miles of trails for hiking and backpacking and 5.5 of for mountain biking.

• Take a hike and keep an eye out for preserved dinosaur tracks.