Perform 8 rounds of 20 seconds work followed immediately by 10 seconds rest for each of the following exercises.  Complete all 8 rounds before moving to the next exercise.

KB swings 25/35
mountain climbers
jump rope
box jumps

Post total reps for each exercise to comments

Good luck to all of those participating in the Layton Marathon/half/10k/5k!  You'll do great!