Rode in 25 miles this morning. Took about 1.5 hours at a nice, relaxed pace. 15 miles on the C&O Canal Towpath and the rest on paved MUP. Very nice ride, but conditions were ideal in the 60s, light wind and no humidity. Usual commute is 15 miles, so this added quite a bit. Must say, commuting 3 hours per day would probably not be doable on a regular basis. Physically, no issue, but 3 hours devoted to cycling every day is simply too much time.