Natural Entrance Trail
What to Expect
Safety Advisory
The descent is steep and sustained, with sections that stay perpetually damp and slippery. Take your time, especially on the switchbacks — a fall on the hard cave floor is no joke, and there's no cell service underground.
The 56-degree cave temperature combined with high humidity can cause mild hypothermia in underdressed hikers, particularly children and older visitors who stop moving to admire formations. Bring that extra layer even if it feels ridiculous in the parking lot.
Trail Details
Pro Tips
Time your entry for late afternoon between May and October to catch the bat flight at dusk — hundreds of thousands of Brazilian free-tailed bats spiral out of the entrance in a living tornado, and you'll have a front-row seat if you're finishing your hike around sunset.
Wear a light jacket or layer even in summer. The cave sits at a steady 56 degrees with high humidity, and after sweating through the descent, you'll chill fast once you stop moving. Grippy-soled shoes are non-negotiable — the paved trail stays damp and slick in spots.
Skip the return climb if your knees are protesting — after exploring the Big Room at the bottom, you can take the elevator back to the surface for free. But walking out the way you came in, watching the entrance grow from a pinpoint of light to a massive skylight overhead, is one of the most dramatic exits in the national park system.
