Plains Bison - Colorado

Was this at Rocky Mountain Arsenal National Wildlife Refuge?

Yep. Probably more like a drive through wildlife park than a wild ecosystem proper.

@Pleistohorse yeah, I see what you mean by that. Unfortunately I didn't make it there last time I was in Colorado, but I definitely plan to visit when I go back to Colorado. I assumed these were taken at Rocky Mountain Arsenal NWR. Did you visit any other national wildlife refuges in Colorado, or only Rocky Mountain Arsenal?

I only had the opportunity to visit here.