Did a big loop this weekend - Fort Collins to Saratoga, WY then south over Cameron Pass and down the Poudre Canyon. Changing leaves seem to be running late by a week or more. Also, the colors generally didn't seem to be as vibrant as usual.
Some areas only 30 - 50% (Centennial, Snowy Range & west slopes of the Medicine Bow range in Colorado), others at 50% or better (east slopes Sierra Madre in Wyoming and the Park Range in Colo). Upper Poudre seemed to be close to peak in most areas. Best color we saw was south of Saratoga in places and approaching Gould. Cottonwoods and Willows along the North Platte from Saratoga south are completely unchanged.
Next weekend could be prime time for color in Northern Colorado and Southern Wyoming.