Before hitting the trail yesterday, I bought a pull-cut saw (12'' blade, coarse cut for logs, 6'' reversible handle, weighs about 2 pounds, $20 at Lowe's Hardware) and it came in handy. It's easy to carry on bike by velcroing it to frame.
A heavy storm had downed about 6 big trees across the 4 mile trail I usually ride. I was able to cut through up to 6'' - 9'' logs and limbs rather easily. It also doulbes as a macchetti - I could swipe through briar vines and various weeds along the trail.
This is the first pull-cut saw I've used and it's way better than any push cut saw, as you're using stonger muscles in a pull stroke than in a push stroke.
Clearing the trail was fun and hard, and it helped all who use the trail. Good upper body workout.
Three 18'' - 24'' logs remain accross the trail.