Hey Greg, I used to live just outside Denver (Golden, CO), and I know quite a few spots to fish. Don't know about the situation in Estes Park, but if you are looking for a good place to fly fish, try the South Platte River from Deckers to the confluence of the North Fork of the South Platte. The road is good, and access is all along it, just find a good place to park, get to fishing. Also, the North Fork is good and is "flies only". Just "Google" Deckers, CO., and check out the map. Tight lines, MIke