Lake O' the Pines, Reservoir in northeastern Texas, US

Lake O' the Pines is a reservoir on Big Cypress Bayou, chiefly in Marion County, Texas, with small parts in Camp, Upshur and Morris Counties. Its concrete-and-earthfill Ferrells Bridge Dam, about 8.5 miles west of Jefferson, is 10,600 feet long. The lake covers 18,680 acres with a conservation storage capacity of 250,000 acre-feet.

Authorized by the Flood Control Act of 1946 as part of flood control in the Red River Basin below Denison Dam, the reservoir was built by the U.S. Army Corps of Engineers. Construction of Ferrells Bridge Dam on Big Cypress Bayou began in January 1955 and was completed on December 11, 1959. Wildlife conservation, recreation and water supply were added as purposes during construction.

The lake draws fishing enthusiasts from across the region who gather for tournaments and casual outings throughout the year. This water body shapes the recreational identity of the surrounding communities.

Multiple boat ramps provide access to the water at different locations, and established campgrounds near the shoreline offer accommodation options for overnight stays. Visitors should arrive early to secure good spots, especially on weekends and during peak fishing seasons.

Local lore holds that Lake O' the Pines shelters catfish so large they are called monstrous, though no evidence has ever been found and most people treat the stories as fishing folklore. The reservoir was formerly known as Ferrell's Bridge Reservoir, after the dam that created it.