91 miles of shoreline and almost no people? Welcome to Pennsylvania’s Allegheny Reservoir

It’s deeper and wilder than you’d expect

Drive far enough into the forests of northern Pennsylvania and the trees open up to something you didn’t see coming: a 27-mile lake with 91 miles of shoreline, surrounded on every side by national forest.

The Allegheny Reservoir crosses into New York, drops to 130 feet in places, and barely has a building on its banks.

What put it here, what it cost, and what you can do on and around it make this one of the most layered places in the state.

The valley that went underwater in the 1960s

Before the mid-1960s, none of this water existed. The U.S. Army Corps of Engineers built the Kinzua Dam to stop the Allegheny River from flooding towns downstream, including Pittsburgh.

Filling the valley meant covering more than 10,000 acres of Seneca Nation land and forcing more than 600 people from homes they held under a treaty signed in 1794. Many Seneca still mourn that loss today.

In 1964, Johnny Cash recorded a song about it, and the story has stayed in circulation ever since.

Walk out onto the Kinzua Dam itself

The dam rises 179 feet and stretches nearly 1,900 feet across, making it one of the largest dams east of the Mississippi River. You can walk out partway and look down both sides.

One side shows water churning through to generate power. The other shows the calm lake spreading back into the trees.

Look down into the shallows and you can often spot big carp moving just below the surface, close enough to make you stop and stare.

The scenic byway that loops through it all

The Longhouse National Scenic Byway makes a 36-mile loop through the forest, with the lake appearing and disappearing through the trees as you drive. Several pull-offs let you stop for the water and the dam.

In early June, mountain laurel blooms pink and white along the roadside. Come the second week of October and the whole drive turns.

Note that in 2026, a section between Dewdrop Campground and Elijah Run Boat Launch stays closed to through-traffic through July 31, so check the route before you go.

Climb to Rimrock Overlook for a clifftop payoff

From Kinzua Beach, a 1.1-mile trail climbs to Rimrock Overlook. The last stretch pushes into moderate to steep territory, so take your time.

Near the top, a narrow stone stairway cut right between the rocks leads down to the base of the cliff. From up top, you get the reservoir spread out below and rolling forest hills reaching to the horizon.

The work to get there is part of why it feels earned when you arrive.

Giant boulders and wide views at Jake’s Rocks

Jakes Rocks sits 650 feet above the water on the southern shore, and a short paved path winds you through a field of boulders to the main overlook.

Trees grow straight through and over some of the rocks along the way. At the top, you take in Jackson Bay, the dam, and more forest than you can measure.

Three roadside pull-offs nearby give you quick views without the walk, good options if you want a taste of the lake and keep moving.

35 miles of mountain bike trails for every skill level

Pennsylvania named the Trails at Jakes Rocks its 2024 Trail of the Year, and the 35-plus miles of connected mountain bike routes give you a sense of why.

Newer riders can take it easy on loops like Tuttletown and Coal Knob.

If you want speed and a challenge, the one-way Blacksnake gravity trail runs fast and keeps you working. The trails connect directly to a lakeside campground, so you can ride all day and camp right where you finished.

The fishing here sets records

The reservoir holds Pennsylvania’s current northern pike record and has produced more muskies over 40 pounds than almost any other lake in the East.

Big brown trout, smallmouth bass and yellow perch round out what’s swimming down there. When the lake freezes over in winter, ice fishing takes hold.

You’ll need a valid Pennsylvania fishing license, and if you’re coming in winter, check ice thickness before you head out. The water gets deep here fast, and 130 feet is a long way down.

Two waterfalls you won’t have to hunt for

Bent Run Falls sits right across the road from the dam, just steps from a small roadside parking area. After heavy rain it splits into three separate streams over the rocks.

A few miles away, Hector Falls drops 22 feet over a square block of sandstone, and the broken stone around it piles into what people call a rock city, a jumbled field of blocks that gives the place a lost-world look.

Both falls are easy to reach, and both are worth the stop.

Swim, paddle, or just drift in a quiet cove

Kinzua Beach runs about 450 feet of shoreline and handles most of the swimming. Wolf Run Marina rents boats if you want to get further out on the water.

Six boat launches scatter across the Pennsylvania side of the lake, and kayaks, canoes and motorboats all share the same wide, calm water.

The reservoir is big enough that even in summer, you can paddle into a quiet cove and find a stretch of shoreline with nobody else on it.

Bald eagles, black bears and beavers in the forest

The Allegheny National Forest around the lake supports more than 70 species of fish and a full spread of wildlife on land. Black bears, white-tailed deer and wild turkey move through the trees.

Bald eagles nest in the area and turn up regularly soaring over the water. Beavers work the creeks and show up along some of the interpretive trails.

Move slowly when you’re out there, especially at dawn and dusk, and the forest tends to give you something to look at.

Camp on the shoreline and get the lake to yourself

The campgrounds here run from full hookups with showers and flush toilets to rustic boat-in and hike-in sites far from any road.

Many sit right on the edge of quiet bays, and the early morning light on the water from a site like that is the kind of thing that makes people come back every year. Dusk does the same thing from the other direction.

A night or two here gives you the lake at both ends of the day, which is when it’s at its best.

Visit the Allegheny Reservoir and Kinzua Dam in Pennsylvania

The dam and reservoir sit within the Allegheny National Forest, about six to 10 miles east of Warren on Route 59 in Warren County.

The Big Bend Visitor Center, run by the U.S. Army Corps of Engineers, opens seasonally from Memorial Day through Labor Day. You can walk out partway onto the dam for views of both the spillway and the lake.

Swimming is allowed at Kinzua Beach.

Check the official website for current campground and trail closures before you plan your trip, especially if you’re coming before August 2026.

This article was created with AI assistance and human editing.

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