Sinlahekin Creek Campground is a primitive, free dry camping area on Washington Department of Fish & Wildlife lands near Tonasket, open late April through October 31st (a Discover Pass or Vehicle Access Pass is required).

The campground offers approximately 4 boondocking sites with vault toilet facilities, no water or hookups, and sites situated near or within earshot of Sinlahekin Creek, making it ideal for backcountry camping and wildlife viewing in a forested setting with diverse bird species and scenic trails.