Guanella pass has a lot of brookies.. I'm not sure what kind of drive you are up to, but the Arkansas river just below Leadville has brookies as well.. Rocky Mountain National Park is good for brookies and greenbacks
Sprague Lake in RMNP is full of brook trout. There are some exquisitely beautiful smaller fish, but the Lake also holds some pretty nice mid-sized fish as well. Sprague is very easy to wade. There are a few spots where the bottom is muddy, and there is a little bit of the lake that is too deep to wade, but I would say probably 80 to 90% of the lake is wadable, and with only decent casting ability you could reach in excess of 90% of the water with a fly. It is artificial flies and lures only, but generally the flies do better there. Go with small midges and small emerger patterns and you can have a lot of fun up there. On your left as you approach Sprague from the Estes side, you will also see Glacier Creek parallel to the road. Glacier Creek has a number of Brookies as well as a number of brown trout. Most of them are small, but are a lot of fun to catch. You could easily catch the Grand Slam if you hit Dream Lake above Bear Lake for Greenback Cutthroat Trout, Sprague Lake and Glacier Creek for Brookies and Browns, and the Big Thompson for Browns and Rainbows. I have done it a couple of times, and it's a lot of fun, but because of the Dream Lake hike, you might want to plan on spending the day. (Oh, the agony of having to fish for trout all day long - I am almost ashamed I suggested it.) Be sure to take your camera along. Those Brook Trout are truly beautiful fish. By the way... where are you from? I am from Johnstown/Loveland, and would be glad to meet up with you some time if you are from the area.
Troutlion & Goaliestar33 Hi, just wnated to say thank you both for that information. I sincerely appreciate it ! By the way I am from around Greeley . Would be interested in meeting you up in that area some time as will. Sincerely average82069