Fall is just around the color and it's predicted that it's going to be hotter than normal. This could make for a longer leaf peeping season. The Denver Chanel predicted when the best times to see the fall colors are.
From thedenverchannel.com:
-Northern mountains: Sept. 20 to Sept. 25
-I-70 area: Sept. 22 to Sept. 30
-Central mountains: End of September into early October
-Southern mountains: Early to mid-October