Lake Carlton is a 70-acre watershed impoundment within Morrison-Rockwood State Park in Whiteside County, Illinois. Created in 1969, the lake features 2.9 miles of shoreline and reaches a maximum depth of 27 feet, with an average depth of 12 feet.

Access is available via a two-lane concrete boat ramp, and the lake operates under a strict no-wake policy to protect the shoreline from erosion. Only boats with motors 10 HP and under are permitted. Boat rentals, including canoes and paddle boats, are available through the park's concession facility during spring, summer, and early fall months. Seasonal boat dock space can be arranged for a fee through the concessionaire.

The lake environment offers opportunities to observe various wildlife, including ducks and geese that frequently inhabit the water. The surrounding landscape features stands of hickory, ash, oak, and walnut trees. A 3.5-mile nature trail circles the lake, providing scenic overlooks and particularly impressive wildflower displays in spring.

The lake was constructed by building a 38-foot high, 1,800-foot long earthen dam across a stream and was named for L. Carlton Anderson, a local conservation leader. Facilities include nine fishing piers and picnic areas with tables and outdoor stoves. The Lakeview picnic area provides elevated views over the water.

During winter months, ice can form on the lake, and park authorities permit ice skating when conditions allow. The lake's water quality supports a diverse fish population, including largemouth bass, bluegill, and muskie, indicating good overall water conditions.

For overnight trips, the park offers 92 Class A camping sites with electricity in wooded areas near the lake. Restroom facilities with showers are available from May 1 through October 31.