The Nooksack Giant was a superlative Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) that grew at Loop's Ranch (now Alpenglow Farm) in Maple Falls in Washington State. It was felled in early 1896 on the Alfred Bruce Loop Homestead with a crosscut saw by a team of men at the North Fork of the Nooksack river. The tree was measured with a tape after felling at 465 feet (142 m) in length, 33 ft 11 in (10.3 m) in circumference, or nearly 11 ft (3.35 m) in diameter at the base, and measured 220 feet (67 m) to the first limb. Ring count showed this tree to be 480 years old. A cross section of the tree was displayed on the corner of Railroad Avenue and Holly Street, New Whatcom, (Now Bellingham) with a wooden placard nailed to the cross section noting the particulars of the tree.

The height of 465 feet would make the Nooksack Giant easily the tallest tree ever reliably recorded on the planet. Although anecdotal reports do exist of other Douglas fir and mountain ash trees reaching 400 to 500 feet (122 to 152 m), such as the 435 ft (133 m) "Ferguson Tree" a Eucalyptus Regnans of the Watt's river, Australia in 1872, or the 415 ft (126 m) Lynn Valley Tree, a Douglas fir felled in 1902 - They are often dismissed as unreliable, while others are considered plausible and even well documented such as the historic "Mineral Tree" a 393 ft (120 m) Douglas fir.

The placard recorded that the Nooksack tree produced 96,345 board feet of the "finest quality" lumber. The New York Times regarded the tree in a March 7, 1897 issue as the "most magnificent fir tree ever beheld by human eyes" and called its destruction a "truly pitiable tale" and a "crime". The Morning Times of February 28, 1897 claimed that the wood, sawed into one-inch strips, would reach from "Whatcom [the tree's location] to China".

It is of some interest that an earlier timber cruise along the Nooksack river in 1891, 15 miles west of Loop's Ranch, by two Sumas lumbermen and surveyors, John M. Saar, and S. H. Soule, reported standing Douglas-fir trees measuring from 9 to 14 feet in diameter, estimated at 350 to 400 feet in height. One grove in particular located within an eighth of a mile of the railroad tracks, along the Nooksack river, south of present Everson was noted, "in all reasonable probability, the finest group of fir trees west of the Cascade Mountains. The diameter of any individual member does not exceed nine feet, but the extreme height, estimated by good judges to be from 350 to 400 feet, the symmetry and perfection in every way is the admiration of those who have viewed them"..."On one acre it was estimated the fir timber would produce a half-million feet of lumber and half as much more of cedar. A single tree near the group rises perfectly straight from the ground, close barked and without a blemish, full two hundred feet or more to the first limb. Its diameter is nine feet, and its height possibly four hundred feet."

• List of tallest trees

48°55′42″N 122°02′56″W / 48.928344°N 122.048887°W / 48.928344; -122.048887