Question: is 25 miles on a bike hard?
Answer: That being said, 25 miles is pretty tame and, even if you don't have everything dialed in as I said, you'll only suffer for a couple of hours. If you already run and lift, 25 miles should not be too hard. ... And 2 miles the day before. You'll be able to take it but depending on how many squats you do, your butt will hurt.