I-84 Exit 25
Also known as Rock. One of the largest natural swimming areas near Portland. It's even more natural the farther east you go east of the main entrance gate. You'll find one of Oregon's two designated nude beaches (1 gay, 1 straight). By design, the nude beach area is completely separate and not visible from the clothing-required area of the large park. The two areas coexist in harmony. Day use pass is $3 at the gate.