Sewell Park is one of the most inviting and relaxing spaces on the Texas State University Campus. The spring fed crystal clear San Marcos River runs through the park and remains 72 degrees' year round. You can relax outdoors while taking advantage of two sand volleyball courts, open spaces for Frisbee, an outdoor basketball court, and grills and picnic tables great for cookouts. The park also offers ample open space for sunbathing, and picnicking. You'll also find the Outdoor Center here, nestled under the trees.