When tourists and television executives fly into North Texas, they see the sprawling headquarters of Bosque Ranch in Weatherford. Spanning hundreds of acres along the Brazos River, the facility serves as a world-class horse training compound, an active television set for Paramount productions, and home to the lucrative The Run for a Million reining event. Muirbrook plays an active administrative and athletic role across these operations.
She is a dedicated competitor in National Cutting Horse Association (NCHA) and National Reined Cow Horse Association (NRCHA) circuits. While celebrity spouses often adopt ranching as an aesthetic hobby, Muirbrook spends several hours daily in the saddle training high-performance quarter horses. Her competitive record includes podium finishes in amateur and non-pro divisions across Texas, Oklahoma, and Nevada.
The scale of their enterprise grew considerably in 2022, when Sheridan spearheaded an investor syndicate to acquire the legendary 6666 Ranch (Four Sixes Ranch) for a reported purchase price exceeding $192 million. Encompassing more than 266,000 acres across West Texas, the Four Sixes is an agricultural and equine breeding titan. Muirbrook works alongside ranch managers, helping steward the breeding lineages and preservation of the historic outfit while balancing Sheridan’s demanding production schedules.
