Cooper Swimming Hole

Cooper River Swimming Hole – Washington’s Secret Mountain Swimming Spot

Just fifteen miles north of Roslyn, Washington along State Route 903, the Cooper River Swimming Hole is often described as one of Washington’s secret swimming holes. Hidden near the Salmon La Sac area, this mountain oasis flows through towering Douglas-fir forests and smooth granite boulders before widening into a deep, emerald-colored pool.

A short walk along the Cooper River Trail leads to the swimming area, where the rushing river slows and forms a refreshing natural pool surrounded by forest and mountain scenery. On warm summer days, visitors come to cool off in the clear water, stretch out on sun-warmed rocks, and enjoy the peaceful sounds of the river moving through the Cascades.

The spot is also known for its adventurous side, with a rope swing and nearby rock ledges that attract confident swimmers looking for a thrill. Others simply enjoy relaxing beside the river, soaking up the sunshine, and taking in the quiet beauty of this hidden mountain setting.

Because of its unique location and crystal-clear water, the Cooper River Swimming Hole has become a favorite summer discovery for visitors exploring Suncadia, Cle Elum, and Roslyn.

Local Tip

Arrive earlier in the day to enjoy the area when it’s quieter and the sunlight filters beautifully through the trees. As with any natural swimming area, use caution around moving water and rocky terrain.

Stay Nearby in Suncadia or Cle Elum

After a refreshing swim in the Cooper River, many visitors return to their Suncadia or Cle Elum vacation home to relax in the hot tub, grill dinner outdoors, and unwind after a day exploring the mountains.

Browse VR 365 vacation homes near Suncadia and Lake Cle Elum and start planning your summer mountain getaway.