Actually my age plus 8--64 miles from the San Fernando Valley (approximately at Valley College) to a law school faculty retreat at the Hyatt in Newport Beach! That beats my personal longest by 14 miles, and my 21st Century best by 29. It took me about 10 hours but my bike computer says I was only rolling for 6.5. Every time I made a wrong turn I stopped for a meal.
My route was almost completely flat with long stretches of river (headwind) bike path, but I only averaged about 10 mph. A lot of that is the engine, of course, but I wonder how much difference it would have made if I hadn't been on my Giant Cypress with 700c 35 tires, with front suspension and very upright position?
Anyway, one of my colleagues decided to announce my mode of transportation to the meeting which was embarrassing but gratifying. Only got one offer to ride with me next year, however.