I have not been riding much this year. Kept my legs in with a few 20 milers and take in a few hills but last Sunday I did a 65 mile ride. No problems and no problems after. The others I did the ride with though are new to cycling. 27 miles in and they were done. Even the "Fitter" ones were finished. So who had the harder ride? Wasn't me so depends on your current level of fitness and previous experience. And I have to hand it to the others- they did finish the ride.
But type of ride will also come into effect. Longest road ride on a road bike has been a double metric. (200 kms) Left me bushed but as the longest I had done before that was 100 miles it was what I expected. BUT- How about a 12 hour ride offroad. 100 miles with 10,000ft of climbing and that always does me in. Attempted it 11 times now and only failed twice. That is a hard ride.
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How long was I in the army? Five foot seven.
Spike Milligan