Once the nation's largest privately owned ranch, peaking at 250,000 acres. Throughout the years, the ranch has had to sell off parcels, including 24,000 acres to the US military in 2006. For all that, today it's the fifth-largest cow-calf ranch in the USA, with at least 12,000 mother cows on 130,000 acres, and producing 12 million pounds of beef annually.