The Real Thing
This is a "true" fir—Abies (AYE-bees, Latin for "silver fir") grandis (GRAND-iss, "grand"), commonly called "grand fir," or "lowland white fir."
Lewis remarked on it (February 6, 1806) as
In fact, grand firs 5 feet in diameter and 200 feet high are fairly common west of the Cascade Range. Balsam, or balm, is an aromatic resin that in Biblical times was believed to have potent medicinal properties.
Stephen F. Arno, Northwest Trees (Seattle: The Mountaineers, 1977), pp. 92-97.
Elbert Little, National Audubon Society Field Guide to North American Trees, Western Region (New York: Knopf, 1980), plate 39; p. 252.