The Catskills Swim Reality

The Catskills' swimming-hole reputation runs ahead of the actual access. Most of the famous spots are either on NYC water-supply land (where swimming is forbidden), or on state forest preserve where access has tightened over the past decade in response to overuse. The result: a handful of legitimate spots, a permit system at the most-famous one, and a long list of "wild" spots that are technically off-limits, dangerous, or both.

This is the practical version — what's actually permitted, what requires a reservation, what's worth the drive.

Peekamoose Blue Hole — Permit Required

The Peekamoose Blue Hole in the Sundown Wild Forest (Ulster County, off Peekamoose Road) is the most-photographed Catskills swimming spot. After years of overuse, vandalism, and emergency-services calls, the New York DEC introduced a permit-required reservation system that runs Memorial Day weekend through Labor Day weekend. Permits are limited per day, free or near-free, and book through the DEC's reservation site weeks in advance for summer weekends.

Outside the permit window (mid-September through mid-May), the area is open without a permit but seasonal closures and parking restrictions still apply. Cold water year-round; the swim window is realistically June through August even with the permit.

Adults 21+ should know the area is state forest preserve land where cannabis consumption is prohibited. Bring sealed product to the lodging, not the trailhead.

Diamond Notch Falls and Hollow

Diamond Notch sits between West Kill and Spruceton in the Greene County hill country. The trail to the falls is short (under a mile from the parking on Spruceton Road), the falls themselves are real (about 8–12 feet), and the pool below is cold-and-deep enough to swim in. Less crowded than Peekamoose because the parking is small and the road in is narrow.

This spot doesn't currently require a permit but state forest preserve rules apply (no consumption, leave-no-trace, pack out trash). The drive in is part of the experience — Spruceton Road is a working back road, not a tourist route.

The Esopus Creek Pools

The Esopus Creek runs through Phoenicia, Mount Tremper, and Boiceville with a series of swimming-and-tubing-friendly stretches. Tube-rental operators (Town Tinker in Phoenicia is the long-running one) shuttle visitors to put-ins for half-day floats; for swim-only spots, the public-access points along Old Route 28 between Phoenicia and Mount Tremper are the standard. The creek is shallower and warmer than the high-mountain pools — better for families and longer hangs.

The Esopus is part of the NYC water-supply watershed but is itself navigable and swimmable below the Ashokan Reservoir release point. State-owned-land cannabis prohibition still applies to creek-side parking and any state-park access.

Mongaup Pond and Beaverkill Campground

For lake-and-pond swimming on developed sites, Mongaup Pond State Campground (Sullivan County) and Beaverkill State Campground offer designated swim areas with lifeguard-managed access during the summer season. Day-use fees apply; both fill on summer weekends. These are the family-friendly options for a swim-as-the-day's-activity rather than a hike-and-swim combination.

What to Skip

• NYC reservoir water (Ashokan, Pepacton, Schoharie, Cannonsville, Roundout) — swimming is illegal across the entire water-supply system, period. Enforcement is real.
• Below Kaaterskill Falls — the falls themselves are spectacular and the pool below looks tempting, but swimming has caused multiple fatalities; signage prohibits swimming and DEC enforces.
• Random "wild" spots from social media — most of the Instagram-famous Catskills swimming spots are on private land, NYC reservoir buffer zones, or unmaintained state-forest stretches. Trespass risk, fines, and rescue costs are all real.

What to Bring

• Permit (Peekamoose specifically, summer Memorial Day–Labor Day window)
• Water shoes (rocky bottoms across all spots)
• Layers (water is cold even in August at the high-mountain spots)
• Pack-out garbage bag (forest preserve rules)
• Sealed product stays at the lodging; no consumption at any swimming hole

Where to Buy

For adults 21+, the closest licensed retailers depend on which side of the region you're hitting:

• Eastern (Diamond Notch, Esopus): Wintergreen in Tannersville, or HERbal in Woodstock
• Western (Peekamoose access via Sundown): Lively Harvest in Margaretville, or southern Ulster County options

Why the Permit System Is Worth It

The Peekamoose permit system feels like friction at booking time but it's the reason the Blue Hole still works. Pre-permit, the area was overrun, trashed, and dangerous. The permit version gives you a guaranteed reasonable-crowd experience at one of the most beautiful natural pools in the Northeast. Adults 21+ planning a structured Catskills weekend should treat the Peekamoose permit like a dinner reservation — book early, plan around it, show up.