Duncan Lake is a 550-acre reservoir with 4 miles of shoreline located 10 miles east of Duncan, Oklahoma. The lake features an enclosed floating fishing dock and a boat ramp for access. Kayaks and canoes are permitted, with calm, clear waters making it suitable for both beginners and experienced paddlers.

All paddlers must obtain a permit before accessing the water. Life preservers are mandatory for anyone using canoes or kayaks on the lake. The lake has specific boating regulations, including a counterclockwise travel direction for all watercraft. Boats must maintain at least 100 feet distance from the shoreline and 200 feet from anchored boats unless approaching a dock or shore.

The landscape surrounding Duncan Lake includes rolling hills and forested areas. Wildlife viewing opportunities include bald eagles, deer, and various waterfowl. The lake supports populations of largemouth bass, crappie, catfish, and sunfish.

Facilities include 44 electrical hookup sites for camping, a sanitary dump station, showers, picnic areas, and a pavilion. A network of hiking and equestrian trails surrounds the lake. The Lakeview Trail offers panoramic views of the water from multiple vantage points.

The lake was constructed between 1948 and 1962 as one of four reservoirs built by the community for drought management. Today, it serves as a year-round recreation destination. Swimming is restricted to designated areas only and is not permitted beyond 50 feet from the shoreline unless within a buoyed area.

Permits can be purchased at self-service kiosks located at the lake (credit/debit cards only). For facility reservations or additional information, contact the City of Duncan Parks Department.