Pete and Jay - thanks for this reminder! I've been thinking of making Greylock a destination once I build my legs back up to what it takes to ride a century in the Berkshires (I'm doing the Great River Ride 100K next weekend as a stepping stone). Do either of you know what Greylock Mountain Road is like? I'd be coming from Hadley and would have already covered about 41 miles by the time I crossed Route 8 in Cheshire, so the shorter ride to the top would be appealing. The reservation map at the DCR website suggests it should be feasible - about 2 miles on a dirt road, then three quarters of a mile on a bike trail - but I'd prefer to talk with someone who's done it before committing myself to it.