If your talking clearing underbrush (less than 2" in DIA)a good brush hog on the back of a 20 hp or bigger tractor will make short work of this. If you don't own one you can rent it. My son and I created trails thru some of the worst brush and brior ticket known to man. My son went out a head with a chan saw to clear larger trees in the path. I ran the tractor in reverse so the mower was in front of me because the brush was so thick I could not drive fwd. We made about a half mile trail and camp site in less than a hour.
