Banks Lake Region Swimming Spots

About Swimming at Banks Lake

Stretching across the high desert of central Washington, Banks Lake is one of the Columbia Plateau's most dramatic and rewarding places to cool off on a summer afternoon. This massive reservoir — formed by the Grand Coulee Dam system — sits cradled between towering basalt cliffs and sagebrush-dusted benches, a landscape sculpted over thousands of years by the cataclysmic Ice Age Floods. The result is something rare: a place where geological grandeur and genuine swimming pleasure exist in the same afternoon.

The Setting: Basalt, Sagebrush, and Open Sky

The Banks Lake region rewards those who slow down and look around. Sheer columns of dark basalt rise from the water's edge, their surfaces streaked with mineral shadows and lichen. On the surrounding slopes, sagebrush perfumes the air with a sharp, earthy scent that becomes almost intoxicating in the summer heat. Osprey and great blue herons patrol the shoreline, while mule deer appear at dusk along the water's edge. Steamboat Rock — the park's defining landmark — looms like a grounded vessel above the coulee, its flat-topped mesa offering a reminder of just how powerful the ancient floods that carved this place truly were. The scenery isn't a backdrop here; it's the whole point.

What Swimming Here Feels Like

The swimming spots around Banks Lake are unofficial, which means you won't find roped-off lanes or a lifeguard's whistle — just open water, warm summer temperatures, and a horizon full of cliffs. By June, the lake warms to genuinely inviting temperatures, and by midsummer, slipping into the clear water feels like the most logical response to the high desert sun beating down on your shoulders. The reservoir is deep in many areas, so confident swimmers will feel most at home, though shallower entry points near the shoreline work well for families with children. The water tends to be clear, giving it a blue-green quality that photographs beautifully and feels refreshing against your skin. There are no crowds jostling for space — just the sound of water lapping against basalt and the occasional hawk riding a thermal overhead.

Plan Your Visit

Camping and full facilities are available at Steamboat Rock State Park, making this an easy destination for an overnight or multi-day trip. The park serves as your base of operations: use it for restrooms, picnic areas, and a launching point for exploring the surrounding coulee. No fee is charged for swimming at the unofficial spots along the lake. The towns of Coulee City and Electric City are both within easy reach and can handle basic supply runs before you settle in. Spring visits bring wildflowers and quiet solitude, while fall trading in summer crowds for crisp air and amber light on the canyon walls. Come in summer if warm water is your priority; come in May if you want the place almost entirely to yourself. Either way, Banks Lake delivers a kind of wide-open, unhurried beauty that's increasingly hard to find.

Nearby Swimming Holes and Trip Planning

It is worth knowing what else is within reach before you set out. Within reach you will also find Douglas Creek (about 51 miles away), Wanapum Lake (about 82 miles away), and Rock Island (about 90 miles away). To plan further, browse more Washington swimming holes, compare other lake swimming holes, or read about lesser-known spots in Washington.