Located 8 miles southeast of Glenrock, the Wyoming Office of State Lands and Investments purchased the ranch in 2006, developed a long-term management plan in 2007 and in 2008 awarded a farm and ranch management lease to the Lankisters, who have collaborated with Game and Fish on habitat projects, wildlife management and hunting access the past 14 years.

The Duncan Ranch features many habitat types and a variety of wildlife species. A hunter management area was established in 2006. The ranch also provides habitat for protected species such as bald and golden eagles and peregrine falcons. It also provides good fishing for brown and rainbow trout. The Lankisters' grazing management and irrigation improvements have benefitted wildlife and habitat.