When I rode the Transam in 2015 I was the oldest rider of any I met, and I was only 62 at that time. That's still pretty young, and so I wonder; Who is the oldest rider to complete the Transam on a self-supported tour? What cyclist do you know over age 60 who has completed a self-supported crossing of the Transam?
The requirement for "self-supported" is an important criterion. Carrying everything on your bike, and not having the security of an instant rescue by a motor vehicle, is a whole different level of adventure than is found in a supported tour. And for purposes of the question, e-bikes don't count; having to rely on your physical strength alone is a different level of adventure than having help from an electric motor.
Looking forward to seeing how many of us older folks have ridden the Transam. FWIW, I am planning another self-supported crossing next year at age 68 - and this time I will be accompanied by another 68 y.o. and a 67 y.o. rider. At least that's the plan now - we had planned on riding it this year, but the virus interfered - so that's how plans go. Best wishes to all,
Buddy Hall
P.S. I posted this on the Crazy Guy site and have since been told about 70 y.o. Jim McTaggart's Transam in 2008. So that's the age record - for now!