Poudre - filter plant section - class II+
Colorad - Pumphouse - class II+
Colorado - Grizzly Crk to Glenwood Spgs - class II
Colorado - Loma - class II
South Platte - class II+
Gunnison - Escalante to Whitewater - class II
Boulder Creek - town run - class II
St. Vrain - Lyons town run - class II
By a copy of Colorado Creeks and River and you'll get all the info you need.
closer to you, the town run in ptown is good when they release from the dam. you can learn tons by just running the whitewater park until you can ferry, roll, peel in and out with no problems and then go run lower parkdale.