I've never seen an on-line cue sheet for the GC, and I've only ever done the 55. If I can find a printed cue sheet, I'll try a scan to Adobe, no promises though. The Huntington Bike Club doesn't seem to keep the cue sheets on their website, either (shame).

All the GC routes are loops, as the ride starts and finishes where you park your car.

In general, the 55 thru 100 mile GC routes head north to Centerport, then west thru Huntington, Oyster Bay, Mill Neck, Locust Valley, Glen Cove, Seacliff, then south to a rest stop in Roslyn. The 55 then heads south towards the LIE, then east thru Westbury, continuing on to Huntington and back to the finish in Greenlawn.

The 75 and 100 do additional loops thru Great Neck and Port Washington, before re-joining the 55, then do additional stuff in the West Hills area.

Thus the distance.

It's also pretty much non-stop hills after the initial down hill to Centerport Harbor, except for the last 5 miles or so thru South Huntington, thus the elevation gained as noted in an earlier post.

FWIW, the north shore of Long Island, from Great Neck in the west, to Pt. Jeff. in the east, is hilly enough. Not Vermont style in terms of steep AND long, but it's certainly possible, if you know the area well enough, to do a punishing set of non-stop steep little climbs, one after the other, for a hundred miles if so desired.

SB.