Colorado Advice?

[DeepDiver75]

I have a really good friend who will be elk hunting in Colorado in September. He's just recently gotten into flyfishing also and he plans to stop and fish around Glenwood Springs for a few days on his way out. I've given him some advice on techniques and a few fly suggestions (I've never been to Colorado so I'm just doling out generic info) but wondered if anyone had any suggestions on which rivers fish best and where he might find good accesses. I'm sure that he will greatly appreciate any info I can pass on to him. Thanks