I’m planning on doing the Harpeth River Ride (62 miles), according to their web-site the routes are challenging.
Does anyone have any feedback on the routes?

It is a great ride. It has rolling hills and a few small climbs. If you can ride 62 in Murfreesboro, you can ride this 62. The ride is well supported with great rest stops. I don't know where all the 62 goes, but the 100 is beautiful.

What he said. I did the 100 last year, but with a bit longer time than Thomas :>. Let's hope the weather is nice like it was last year.