Along with cattle, Colorado's chief crops are corn, wheat, and hay. (The most recent official statistics from the Bureau of Economic Analysis don't yet account for Colorado's marijuana crop.) Based on recent Lands of America data, Colorado ranks fifth in the country for the combined acreage currently available for sale in the state. The overall value of land for sale in the state amounts to nearly $9 billion, and covers 1 million acres. Of all the counties in Colorado, Park County has the most ranches, farms, hunting land and other rural land and acreage for sale. Looking at data recently recorded through the Lands of America Comparable Sales program, the most land and rural property sales were recorded in Costilla County. Some suggested agricultural applications for land currently listed for sale in Colorado include for livestock, irrigation, poultry, row crop, timber, aquaculture, vineyard, or orchard use. Hunters can find game including mule deer, elk, turkey, bear, and grouse on land for sale here, while anglers can cast for trout, bass, pike, and salmon. Colorado's real estate and land prices can veer wildly based on proximity to hot markets in four-season resort towns like Aspen, Crested Butte and Telluride, as well as in the metro and suburban areas surrounding Denver and Boulder (home of the University of Colorado). However, it's no surprise that Colorado ranks highly as a retirement destination, with generally excellent weather and a healthy, outdoorsy lifestyle that's ideally suited toward active retirees. Taxes in Colorado are also relatively low, with a flat 4.63% state income-tax rate and no estate or inheritance taxes.