Overview Cougar Flat Campground is nestled into a mountain forest northwest of Naches, Washington. The campground offers an ideal setting for families and outdoor enthusiasts looking for a secluded camping experience in the beautiful Okanogan-Wenatchee National Forest.Recreation In addition to being a prime location for hiking, fishing, hunting, horseback riding and mountain biking in summer and early fall, Cougar Flat offers excellent skiing, snowshoeing and snowmobiling in the winter months.