Jacob’s Well Natural Area, located just west of Wimberley, Texas, is home to the mouth of the second-largest fully submerged cave in the state. Historically, this artesian spring flowed powerfully, reaching heights of 4-5 feet and releasing 170 gallons of water per second as recently as 1924.

A History of Decline

However, prolonged drought conditions and increased demand on the Trinity Aquifer have drastically reduced the spring’s flow. The well went completely dry for the first time in recorded history in 2000, and again in 2008, 2009, 2011, 2013, and 2021. Currently, the spring has zero flow.

The Impact of Drought

Since June 2022, Jacob’s Well has been indefinitely closed to swimmers. What was once a clear, refreshing swimming hole is now described as a “sickening green pool clogged with algae.” This transformation represents a significant ecological tragedy for the region.

Exploring the Natural Area

Despite the diminished spring flow, the 81-acre Jacob’s Well Natural Area remains open to the public. The Hays County Parks Department has maintained hiking trails, a nature center, and offers guided tours on Saturdays from September through June.

Cypress Creek and Blue Hole

Jacob’s Well serves as the headwaters of Cypress Creek, which in turn feeds Blue Hole Regional Park, another popular swimming destination downstream. The decline of Jacob’s Well directly impacts the water levels and health of these connected ecosystems.

Expanding Preservation Efforts

Hays County has actively worked to protect the land surrounding Jacob’s Well since 1996, establishing it as a Nature Preserve in 2010. In 2023, the county added the 175-acre Karst Canyon Preserve, adjacent to Jacob’s Well.

Karst Canyon Preserve

The Karst Canyon Preserve features over two miles of hiking trails, a bat cave, and habitat for the golden-cheeked warbler. The karst landscape, characterized by porous limestone formations, plays a crucial role in replenishing the aquifer. The preserve’s terrain is defined by Ashe juniper forests and exposed limestone.

Jacob’s Well Natural Area is located at 1699 Mt. Sharp Rd., less than 5 miles west of Wimberley, and is open daily from 8am to 6pm. More information can be found on the Hays County Parks website.