Henderson County Conservation Area, which includes Gladstone Lake, offers a variety of recreational facilities. The 27-acre lake has a shoreline of 1.5 miles and a maximum depth of 25 feet. The area, about 20 miles southwest of Monmouth and five miles east of the Mississippi River, has a total of 87 acres.
Henderson County Conservation Area was purchased by the state in 1961 from the C. B. & Q. Railroad. The railroad used the area to dredge sand and gravel for use in its railroad maintenance. The lake water was used for filling the train’s steam engine.