These include unusual species such as Scots pine and Lodgepole pine, and Douglas fir and Cork fir .
They have also grown juniper shrubs and maple, fir and pine trees.
At 2,100m is the Pilu Sacred Tree, a massive fir that is thousands of years old.
Here and there, clumps of fir and birch trees rise out of the muddy wastes.
If you were stranded in the woods during a storm, you would be a bit safer standing under a tree with large flat leaves like oak, than you would under a fir or pine tree.
Nests are usually built in deciduous trees, such as aspen, alder, cottonwood, or willow, but they may also be in firs or other conifers.
For spruces, firs and Douglas-fir, three or more years are usually needed to produce high quality planting stock.
I've had my share of disasters from grasshoppers, including having the bark on my young evergreen firs eaten when there was still lots of other forage.
Conifers are seed plants; they include pines, firs , yew, redwood, and many other large trees.
The vista beyond was dotted with leafless trees and throngs of firs and pine.