Did this yesterday. One of the hardest one day rides I have done, considering the heat and humidity. 100 miles and 10,000 feet of climbing, including 8 miles up Mt Greylock.

I probably drank 12 bottles of cytomax and ate a few gu's and cliff bars so I did'nt cramp up but I was definitely close to heat exhaustion between 55 and 80 miles. I lost 4 pounds. I'm ready for the Catskills Century!

i guess i can't resist:

thursday (8/18): vail to vail pass (14 miles, 2500') on a tandem bike.
saturday (8/20): chasm lake and back on foot
monday (8/22): long's peak from the ranger station on foot (15 miles RT and 7500' climbed to reach 14,255)
wednesday (8/24): mount evans on road bike (up 7,500' over 28 miles from I-70 to the summit observatory at 14,2??)
friday (8/26): frisco to copper to leadville (via fremont pass, climax mine), to minturn (via tennessee pass, camp hale, battle mountain summit pass), to vail on road bike, 6000' climbing, 68 miles (lowest elev was about 7500').
sunday (yesterday): manhattan half marathon by sneaker!

ready for the tour! (and the wheelchair....i'm hurtin bigtime!!).