The Pedernales River runs clear, cold, and inviting through the heart of the park — and on a hot Texas afternoon, there’s nowhere better to cool off. But Pedernales Falls is also one of the most dangerous swimming destinations in the state if you don’t know the rules.
This guide tells you exactly where it’s safe to swim, where it isn’t, and how to enjoy the river without becoming a statistic.
Quick Swimming Facts
- Best swim spot: Trammel’s Crossing / Twin Falls swimming area
- Closed to swimming: The main falls itself (mandatory — strict enforcement)
- Water temperature: 60s°F in spring/fall, 70s°F in summer
- Lifeguards: None — swim at your own risk
- Best time to swim: Late morning to early afternoon in summer
- Closures: Common after heavy rain due to flash flood risk
Where to Swim
Twin Falls / Trammel’s Crossing Swimming Area
This is the designated swimming zone — a stretch of the river with shallow pools, gentle cascades, and rocky shelves perfect for lounging. The water is clear enough to see your toes, and the limestone shelves make natural seats and platforms.
How to get there: Park at the Trammel’s Crossing or Twin Falls trailhead and walk down the short, easy trail to the river.
What you’ll find:
– Shallow wading pools good for kids
– Deeper pools for adults
– Natural waterslides over smooth limestone (water levels permitting)
– Plenty of flat rocks to sun on
Crowd level: Busy on summer weekends — arrive before 11am for the best spots. Quiet most weekdays and any time outside summer.
Smaller Pools Along the River
If you’re up for a short hike, several quieter pools are scattered along the river upstream and downstream of the main swimming area. The Trammel’s Crossing trail passes a few. They’re harder to reach, less developed, and almost always less crowded.
Where You CANNOT Swim
The Main Pedernales Falls
The dramatic, stepped limestone cascades that give the park its name are strictly closed to swimming. The currents above the drops pull swimmers over the edge, and the recirculating hydraulics below the drops have killed multiple visitors. Rangers patrol and enforce this rigorously.
The overlook gives you great photos. Don’t go beyond it.
Closed Areas After Rain
When the river rises, swimming areas close — sometimes within minutes. Even mild rain miles upstream can make the river dangerous downstream at the park.
Always check before you go:
– Park status page on the Texas Parks & Wildlife website
– Call the park office at (830) 868-7304
– Look for posted signs and ranger announcements at the entrance
What to Bring for a Day of Swimming
Essentials
- Water shoes or sport sandals with straps — flip-flops slip on wet limestone and you will fall
- Sunscreen — there’s limited shade at the swim area
- Towel and dry clothes for the drive home
- Water and snacks — no concessions at the river
- Dry bag for your phone, keys, and wallet
- Trash bag to pack out everything
Nice to Have
- Swim goggles — clear water makes underwater scenery genuinely cool
- Pool float or inflatable for the deeper pools (no motorized craft)
- Cooler with ice for drinks
- Camp chair for the rocks
- Sun shelter / pop-up tent — shade is limited, and one of these makes a long afternoon way more comfortable
Don’t Bring
- Glass containers — strictly prohibited near the river
- Loud speakers — the park has noise rules and rangers will ask you to turn it down
- Pets in the swim area — dogs are okay on leash on the trails but discouraged in busy swim zones for everyone’s safety
Swimming Safety
The Pedernales has killed people who didn’t take it seriously. Here’s how to stay safe:
Flash Flood Awareness
The river can rise from ankle deep to chest deep in 15 minutes after rain falls miles upstream. You may have blue skies overhead and still be in danger.
Warning signs:
– Sudden change in water color (clear to brown)
– Increase in water flow or new debris floating by
– Rumbling or roaring sound from upstream
– Park warning siren
If you hear the siren or see any of these signs, get to high ground immediately. Don’t pause to grab your stuff.
Strong Currents
Even in the safe swim zones, currents pick up after rain and around drop-offs. Don’t swim against a current you can’t easily beat.
Cold Water
Spring water keeps the river cool year-round. Even in summer, prolonged swimming can lead to mild hypothermia, especially for kids. Take breaks to warm up on the rocks.
Slippery Rocks
Limestone polished by water is genuinely treacherous. Walk slowly, plant each foot firmly, and don’t run on the rocks. Most injuries here are from falls, not drowning.
Children
Kids should always wear a Coast Guard-approved life jacket in deeper water — the park rents these for free at the office on a first-come basis. Never let kids swim unsupervised near current.
Swimming with Kids
Pedernales Falls is great for families, but pick your spots:
- Best for toddlers/young kids: The shallow pools at the upstream end of Twin Falls. Calm water, easy entry, lots of small rocks to play with.
- Avoid with young kids: The deeper pools below the cascades and anywhere current is visible.
- Free life jackets: Available at the park office. Borrow them.
Bring shade — kids overheat fast in Texas summers and the swim area has minimal natural shade.
Tubing the Pedernales
Tubing is allowed in designated areas of the river. There are no tube rentals inside the park, so bring your own.
Best tubing stretches are above and below the swim area where the river is mellow but flowing. Tubing through the main falls is prohibited (and would be deadly).
Best Time to Swim
Summer (June – August) — Peak season. River is warmest, days are longest, and the water feels incredible after a hike. Most crowded.
Late Spring (May) — River runs strong, temperatures are mild but warming. Great window before crowds peak.
Early Fall (September) — Water still warm, crowds thinning, beautiful golden light.
Spring (March – April) — Water is brisk but swimmable on warm afternoons.
Winter — Cold-water swims for the brave. Air temperature can be 70°F in February with water in the low 50s.
After Your Swim
The drive back to Austin is about 50 minutes — a perfect window for:
- A late lunch in Johnson City (try Pecan Street Brewing or Bryan’s on 290)
- A stop at a Hill Country winery or distillery
- A sunset photo at one of the park overlooks before you leave
Swimming at Pedernales Falls is one of the great experiences central Texas has to offer. Respect the river, follow the rules, and you’ll have a perfect day.
Have questions about visiting with kids or pets? Contact us — we’re happy to help you plan.
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