I used to hunt pronghorn out there. The hunting can be pretty good but be advised it is all private land and most of it is leased by outfitters. Unless you know someone or are paying to hunt it will probably be hard to get on any quality land.
Where I used to hunt was a big ranch the owner let us on. He died and his son inherited the ranch. The first year he had it he leased it to an outfitter. Thus ended my hunting around Limon. I'm a 5th generation native of CO and I'm not about to pay an outfitter to hunt. I knew other land owners in different areas so I simply began to hunt elsewhere.