The aspens in my yard at 7500 feet are just now starting to get a hint of yellow to them. The bigger groves around here even at 10k are still light green. It's been warm. Supposedly we'll be chilling off soon, so assuming a fall like pattern starts within a week or so, I'd say a peak is around 3 weeks away. I'm in northern New Mexico. I think most of Colorado peaks about 1-2 weeks before us.Drove Squaw Pass road the other day. Very very few aspen groves are yellow. Most are light green. Id say at least 7 days for a general peak at 10k feet.
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