Almost half of Oregon's 61-million-acres of land area (30 million acres) is forested. The area of forest in Oregon is almost evenly divided between the east and west side of the Cascade Crest. The Willamette Valley, Columbia Basin, and southeastern region (Northwestern Basin and Range and Owyhee Uplands) are sparsely forested. The Oregon Coast Range has the highest percentage of forested land in the state (90 percent). The close proximity to the Pacific Ocean results in mild temperatures and high precipitation in the Coast Range, resulting in excellent growing conditions.
- About 86 percent of Oregon’s forests are dominated by coniferous forest types, predominantly Douglas-fir (35 percent of all forested land area), ponderosa pine (16 percent), and fir/spruce/mountain hemlock (12 percent).
- Hardwood forest types cover an additional 3 million acres (12 percent of forested land area). The major hardwood forest types are alder/maple (1.2 million acres), western oak (800,000 acres), and tanoak/laurel (600,000 acres).
- Oregon has approximately 100 billion net cubic feet (433 billion board feet) of wood volume on forest land with a mean volume of about 3,322 cubic feet (14,204 board feet) per acre.
- The greatest proportion of wood volume is found in commercially important softwood tree species such as Douglas-fir, true firs, pines, and western hemlock, which collectively make up 93 percent of all live-tree volume on Oregon forest land.
- Total estimated biomass in live trees and dead wood across Oregon is 2.7 billion tons.
- There is almost three times as much biomass in live trees compared to dead trees.
- Over 2 billion tons of biomass and 1 billion tons of carbon have accumulated in live trees (equal to or greater than 1 inch diameter at breast height), primarily on US Forest Service land (56 percent).
- Softwood forest types have 10 times the amount of biomass and carbon as hardwood types.
- Douglas-fir is the most abundant tree species in Oregon, and therefore contributes the most to biomass and carbon storage. The more than 1 billion tons of Douglas-fir biomass represents about 573 million tons of carbon sequestered in live trees.