Balmorhea State Park
Subnational Park · Toyahvale, Texas
A 46-acre park in the West Texas desert built around San Solomon Springs, whose artesian flow fills the world's largest spring-fed swimming pool — 1.3 acres, 3.5 million gallons, up to thirty feet deep, and a constant 72 to 76 degrees year-round. The flow is so strong that no chlorination is needed, and swimmers share the water with two endangered desert fish found nowhere else. The Civilian Conservation Corps hand-cut the stone in the 1930s.
9207 Texas Highway 17, Toyahvale, Texas, 79786, United States
Pool open 8 AM - 7:30 PM or sunset, whichever comes first, year-round. $7 adult, free 12 and under. ⚠ DAY-USE CAPPED AT 650 PEOPLE — walk-ins refused once full, so reserve a day pass. NO LIFEGUARDS. Annual pool-cleaning closure in late April (27 Apr - 1 May in 2026). No swimming in the canals.
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