Aquarena Springs, San Marcos, TX

## Overview Aquarena Springs in San Marcos, Texas, is one of the most remarkable natural spring systems in the Lone Star State. Fed by the San Marcos Springs — the second-largest spring group in Texas and among the largest in the American Southwest — these springs discharge an average of roughly 200 cubic feet per second of crystal-clear water from the Edwards Aquifer. The springs maintain a remarkably consistent temperature of approximately 72°F (22°C) year-round, making them a beloved destination for swimming, paddling, and nature appreciation in every season. The San Marcos Springs have been a vital water source for thousands of years. Archaeological evidence at the nearby Spring Lake site suggests continuous human habitation dating back over 12,000 years, making it one of the longest continuously inhabited sites in North America. The Tonkawa and Coahuiltecan peoples are among the Indigenous groups known to have used these springs. In the 20th century, the site operated as a popular commercial theme park called Aquarena Springs, featuring glass-bottom boat rides, an underwater theater, and the famous "Ralph the Swimming Pig." The theme park closed in 1996 when Texas State University (then Southwest Texas State University) acquired the property and began restoring it to a more natural state. Today, the area is managed as the Meadows Center for Water and the Environment at Spring Lake, and it remains open to the public for recreation and education. The water emerging from the Edwards Aquifer has been historically regarded as exceptionally clean and has long been used as a drinking water source for the city of San Marcos. The San Marcos River, which begins at these springs, supports several endangered and threatened species, including the San Marcos salamander and Texas wild rice, underscoring the ecological purity of the habitat. While the spring water has been reported to be of high quality, visitors should exercise their own judgment regarding untreated water consumption, as filtering may be advisable. ## Directions 1. From **Interstate 35**, take **Exit 206** toward Aquarena Springs Drive in San Marcos, TX. 2. Head west on **Aquarena Springs Drive** for approximately 1 mile. 3. The springs and Spring Lake are located at **1602 Aquarena Springs Drive**, adjacent to the Texas State University campus. 4. Look for signage for the **Meadows Center for Water and the Environment** — this is the primary access point for Spring Lake and the historic Aquarena Springs area. 5. Parking is available on-site. During busy weekends and summer months, arrive early to secure a spot. **GPS Coordinates:** 29.892754, -97.918152 ## What to Expect Visitors to Aquarena Springs and the surrounding San Marcos River area will find an inviting natural oasis with remarkably clear, temperature-stable water. The springs feed directly into Spring Lake and the headwaters of the San Marcos River, creating a stunning turquoise-blue waterway that's perfect for recreation. **Swimming & Tubing:** The San Marcos River downstream of the springs is one of the most popular tubing and swimming destinations in Central Texas. The water stays a refreshing 72°F year-round, drawing crowds of families, college students, and outdoor enthusiasts — especially during the hot Texas summers. Tubing outfitters operate along the river and offer tube rentals and shuttle services. **Kayaking & Canoeing:** Kayak and canoe rentals are available in the area, offering a peaceful way to explore the river. Paddling through the clear spring-fed waters provides excellent views of aquatic vegetation and wildlife below the surface. **Glass-Bottom Boats:** At the Meadows Center, glass-bottom boat tours on Spring Lake offer a unique perspective on the spring vents bubbling up from the aquifer floor — a tradition that dates back to the original Aquarena Springs theme park era. **Surroundings:** The area is well-developed with walkways, educational exhibits, and restroom facilities at the Meadows Center. The adjacent Texas State University campus adds a lively, youthful atmosphere to the neighborhood. Restaurants, shops, and accommodations are plentiful in downtown San Marcos, just minutes away. **Hours & Access:** The river and public access areas are generally accessible at all hours, though the Meadows Center and its programs operate on posted schedules. Check ahead for glass-bottom boat tour times and any seasonal closures. **Ecological Note:** The springs and river are home to several endangered species. Visitors are encouraged to stay on designated paths, avoid disturbing aquatic vegetation, and refrain from using sunscreen or chemicals before entering the water to help protect this fragile ecosystem.