Hi Bill
When I was in Crested Butte the last week of August, the leaves were
already beginning to turn.  In fact, more color was showing in
Crested Butte then than we saw on the drive from Anchorage to
Homer last week.  I estimated in August that peak would
be a week early.  Local weather forecasters said earlier
than that.  My son went camping last weekend at Guenella
Pass (11,000 feet south of Georgetown by I70) and says the aspens were
at peak, a perfect golden yellow.  All this implies that peak
is this coming week in the San Juans (without actual info
from that area).

Roger

I have a friend in Cedaredge that sent me some lovely fall color photos
on the 5th. He was up on the Grand Mesa, they've also had their first
snow. One of the photos was of a pond with a hill in shade. Where the
sun had shone, the snow melted, but the shaded hill was still covered
with a skiff. Very cool photo, it looked like half summer, half winter.
I had to ask if it was photoshopped, it was not :-)

I was at Aspen Alley in the Medicine Bow NF on the 10th and the color
had just barely started there. I also heard from a friend about the same
time that US191 going Rock Springs to Vernal was starting to turn.

There's also this page:
http://www.fs.fed.us/r2/recreation/fallcolors/report/
Looks like they update once a week.