Thanks for that suggestion, RonH..I'll give that great consideration.
65km would be just shy of 40.5 miles. I may work up to that in 3 1/2 weeks,
provided I get my butt in the saddle.........

Roads here in South Mississippi are a bit more rolling than they were for the many years I spent cycling in west and central Florida.
That tends to increase the difficulty factor and decrease the speed factor (along with age, of course.)
In my (much) younger days we would drive to San Antonio/Dade City for some hills, and of course, there was Clermont. The hills here are not nearly as severe, but there seems to be more of them.

I'll give the metric version much thought!