Ponderosas can be a very large tree. With trunks often bigger than 3' in diameter. When they are down and across the trail, They are a formible obsticle. The Lodgepole Pines are very straight, but they don't often get more than 12" in diameter.
Of course the new growth coming back in after the fire is Quaking Aspin. The fire removes the mature forest of pines and Quakies quickly bring new growth back into the area.