Greetings--I just purchased 20 week Marathon Training Plan and am excited about starting. I noticed that the duration of endurance run workouts never exceed 1:30. I am aiming for a 3:45 marathon. So no longer duration runs in the weeks leading up to my race(20-21 miles) ?? I am assuming that strength/endurance/efficiency developed during the 20 weeks will be enough to carry me through that distance.
Also, I plan to do most of my training on trails because I find it more enjoyable, but my marathon is on the road. Do you think I should do any workouts on the pavement?
Any input would be appreciated.