Hey, Mike, you should have named whole sections of that course "No Country for Old Men". Jeepers. Woke up this morning feeling like somebody had taken a mallet to my knees.
6 x 6 minutes of trail running over hill and dale at 90% with 90 seconds btwn sets. Trixy was out with me, but did the about 15 times the work I did. Damn quadraped advantage.