Welcome to Winthrop Washington Our campground is located in Washington near the base of the North Cascades National Park and within the city limits of the Old West town of Winthrop. Winthrop features restaurants, galleries, museums and shops fashioned in the early Western and mining tradition. For the outdoor enthusiasts, there are multiple biking, hiking, boating, horseback riding, and fishing opportunities within a short drive. Check out our campground amenities page or call our office to see what our campground and surrounding areas have to offer during your stay.Heated pool open mid-May through mid-October (*Dependent on current weather conditions).Max pull thru: 70 feet.