Nuclear Lake Loop Hudson Valley hike view

Nuclear Lake Loop

Moderate
★★★★☆ 4.3/5
Distance5 mi
Duration2.5 hours
Elevation Gain500 ft
Trail TypeLoop
Best SeasonSpring through Fall

About This Trail

A loop around a pristine lake with a wild history - it was once a nuclear research facility. Now it's a peaceful hike along the Appalachian Trail with a crystal-clear lake, rolling hills, and one of the most unique backstories of any trail in New York.

This trail is part of Hudson Highlands State Park Preservein the Hudson Valley region — explore all hikes in New York.

Who This Hike Is For

Fitness LevelModerate — regular walking or light exercise helps
Experience NeededSome trail experience is helpful but not required
Great ForCasual hikers, couples, teens and fit older adults
Heads UpNot recommended for very young children or those with significant mobility issues

Location

Nuclear Lake Trailhead, West Dover Rd, Pawling, NY

Our Review

Moderate★★★★☆ 4.3/5

Nuclear Lake. Yes, that's really its name. And yes, it was actually a nuclear research facility in the 1950s and 60s. The United Nuclear Corporation ran a lab here studying plutonium fuel rods until an explosion in 1972 forced them to shut down. They cleaned the site, the government declared it safe, and now it's a stop on the Appalachian Trail with a gorgeous lake that almost nobody swims in. The name alone keeps most people away, which honestly makes it better for hiking.

We parked on West Dover Road where the AT crosses and headed east toward the lake. The trail climbs gently through hardwood forest for about a mile before you catch your first glimpse of the water through the trees. The lake is surprisingly beautiful - clear water, rocky shores, surrounded by forest on all sides with no development visible. If you didn't know the history, you'd think it was a pristine wilderness lake.

The full loop goes around the lake and connects back via the AT. The western side of the lake has some rocky sections and minor elevation changes. The eastern side is flatter and closer to the water. We went counterclockwise and liked the flow - you get the climbing done first and then cruise along the lakeside on the way back.

The lake itself is the star. There are several spots where the trail comes right to the water's edge with views across to the far shore. We found a flat rock jutting into the lake about halfway around and stopped for lunch. Complete silence except for birds and the occasional fish hitting the surface. Nobody else was there.

Here's the thing - despite the name, the site has been extensively tested and declared safe by the EPA. The radiation levels are at normal background levels. You're not going to grow a third arm. But the history adds this fascinating layer to the hike. You're walking through what was once a top-secret nuclear research facility, and now nature has completely reclaimed it. There's something poetic about that.

The trail is moderate due to some rocky, uneven footing and a few short climbs, but nothing strenuous. The total loop with the approach from West Dover Road is about 5 miles. We did it in about 2.5 hours with a nice long lunch break by the water.

This is one of our favorite "tell people about it and watch their reaction" hikes. The name gets everyone's attention, the history is fascinating, and the actual hiking is genuinely beautiful. It's the full package.

See our photos from this hike on Instagram @best.hikes.usa

Tips for Hikers

It's Safe - Really

The site was cleaned up and tested extensively. EPA confirmed radiation levels are at normal background. The scary name keeps crowds away but there's zero actual danger from radiation.

Go Counterclockwise

Starting on the western/AT side and looping around to the eastern shore gives you the best flow. You get the climbing done first and end with easy lakeside walking.

Great Lunch Spots by the Water

There are several flat rocks right at the lake edge that are perfect for sitting and having lunch. The midpoint of the loop has the best water access.

Don't Swim

While the site is declared safe, swimming isn't recommended or common. It's not officially prohibited but the history makes most people cautious. Stick to enjoying it from shore.

Combine with Hurd Corners

This trail connects to the same AT section as Hurd Corners. If you want a longer day, you can link the two sections together for 8+ miles of varied terrain.

Food & Drink

The Village ScoopCafe

7 Charles Colman Blvd, Pawling, NY 12564

Ice cream shop in the center of Pawling. Perfect reward after an easy hike. Good variety of flavors and a friendly vibe.

View in Google Maps

McKinney & Doyle Fine FoodsRestaurant

10 Charles Colman Blvd, Pawling, NY 12564

Upscale cafe and bakery in downtown Pawling. Great sandwiches, salads, and baked goods. Nice spot for a post-hike lunch.

View in Google Maps

What to Bring

These are the items we bring on every hike. Links help support this site at no extra cost to you.

Hiking Boots

Rocky, rooted trails in the Northeast need real ankle support.

We use: Merrell Moab 3 Mid WP

Water Bottle / Hydration Pack

Bring at least 2 liters. Most trails here don't have safe water refill points along the route.

We use: CamelBak Chute Mag 32oz

Daypack (20–30L)

Fits water, food, rain layer, headlamp, and a basic first aid kit comfortably.

We use: Osprey Talon 22

Trekking Poles

The rocky ridges here — especially on descents — are much more manageable with poles.

We use: Black Diamond Trail Ergo Cork

Headlamp

Trail forests get dark fast. Always carry one even on planned half-day hikes.

We use: Black Diamond Spot 400

Rain Jacket

Northeast mountain weather is unpredictable. Afternoon storms roll in without warning — always have a packable layer.

We use: Marmot PreCip Eco Rain Jacket

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