The trees in the photos are all Lodgepole Pines which are much smaller than the Ponderosa Pines. The Lodgepole are found in the Alpine region, Ponderosa are a Sub-Alpine, meaning they are found at lower elevations. I see the Ponderrosa in the 5000 to 8000 foot elevations. We see the Lodgepole pines and Elgin Spruce above 8000 foot.
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.