Kolorado-Tanne
Tree species for which the forest is important include bigcone Douglas-fir ("Pseudotsuga macrocarpa"), Coulter pine ("Pinus coulteri"), and California walnut ("Juglans californica"). The National Forest also contains some of old growth, with: Jeffrey pine ("Pinus jeffreyi") forests and mixed conifer forests (Coast Douglas-fir ("Pseudotsuga menziesii" var. "menziesii"), ponderosa pine ("Pinus ponderosa"), and white fir ("Abies concolor")), and lodgepole pine ("Pinus contorta") the most abundant types.