Three, 20 minute sets on the Stairmaster. I carried no weight because I have a pulled muscle in my back.
First @ level 9. The second at level 7. The last at level 5.

2 hours on the stationary bike

2 hour bike ride, about 28 miles

2 hours on the hill with 67 lbs

1.25 hours on the ski hill with 67 lbs in the pack