Bill in Houston from Houston on 8/19/2019 8:58:53 AM:
If you average 10-12 mph on pavement, you're looking at ~8 mph on the gravel on the KATY. It really sucks the energy out of your tires.
We trained by riding on pavement, and had 40 mile rides under our belts, but the trail gave us a serious beatdown. We enjoyed it, and it felt like an accomplishment, but it was what we call Type 2 Fun. :)
Our first day was Clinton to Sedalia, 41 miles, 5 hours 29 minutes moving time. Whew!