on the weekend i hit the 17 mile mark, and boy was it tough! i'd driven 8 hours the day before, didn't sleep all that well, ate too much cheese and sugar with dinner, and headed down a road whose hill factor was unknown. the entire route was rolling hills, and i left later than i wanted. thankfully the sun stayed hidden for the majority of the time. i was almost staggering by the time i was done. i had to drive 8 hours the next day too. i felt the soreness even in yesterdays interval run, which was 4 days later. thankfully i only have to do 10 this weekend, a light one!