Twenty-Five Mile Creek State Park is a 232-acre public recreation area on the western side of Lake Chelan in Washington, about 15 miles northwest of Chelan. Once a private resort, it entered state ownership in 1972, though various concessionaires operated it under lease for years before the state assumed direct staffing in 1988. That past shaped its combination of developed visitor facilities and resort-style lake access. The park serves both active and quiet recreation, offering camping, a marina, fishing, and waterskiing on Lake Chelan, along with bird watching and mountain biking inland, while preserving public access to a scenic stretch of shoreline.