Fort Leaton functioned primarily as a private fortified trading post and ranch headquarters rather than a military installation. Built around an earlier 1830s adobe residence and expanded in 1848 by Benjamin Leaton, the massive adobe compound served as the operating base for Leaton's freight-hauling business along the Chihuahua Trail, which linked Chihuahua, Mexico, with points north. Within its thick walls, Leaton ran a trading post where he exchanged goods with local settlers, Mexican traders, and Native American groups, including Apache and Comanche bands, sometimes trading munitions and other supplies for livestock. The fortress-like construction, with its high adobe walls and small windows, allowed the compound to double as a defensible refuge along the sparsely settled Rio Grande frontier near present-day Presidio. When Presidio County was organized in 1850, Fort Leaton briefly served as the county's first seat of government, reflecting its role as the primary hub of activity in the region. After Leaton's death the property changed hands several times, continuing as a trading and ranching operation into the early twentieth century before being abandoned in the 1920s. Today Fort Leaton operates as a Texas State Historic Site managed by Texas Parks and Wildlife. The restored adobe structure houses interpretive exhibits and a small museum focused on trade, ranching, and frontier life along the Rio Grande, and the grounds include nature trails, picnic areas, and a visitor center open to the public for tours.