Well THAT was the hardest training run I've done in a very long time.
2 x 3 miles at/near target HM pace, with 5 minutes rest between. Good news is that both intervals were within 4 sec/mile of my target pace (8:25), bad news is that the second one was slower (8:29 vs 8:22 for the first one). But I think the back side of the one hill is steeper and longer than the outbound side.
I just ate an entire can of tuna fish and I think I'm going to need more protein before the night is over. 
PR at Columbus may be possible. Maybe.
Speed comes from what you put behind you. - Judi Ketteler