The 261-acre Bonham State Park falls within the northern extent of the Blackland Prairie, an area marked by grasslands interspersed with woodlands, near the Oklahoma border. The Civilian Conservation Corps developed the park, landscaping the rocky, hilly terrain for erosion control and recreational purposes, and constructing an earthen dam to impound a sixty-five-acre lake. Many of the structures built by the CCC are still in use today. Activities include (unsupervised) swimming and fishing in the man-made lake, built in 1935, as well as camping, picnicking, mountain biking and boating.