Earlier in growth, G. oregonensis can be difficult to distinguish from other members of the genus Gomphidius, such as G. glutinosus, which is the most common and widespread species.

[1] The genus name is derived from the Greek γομφος, gomphos, meaning "nail-bolt"[2] and relates to the shape of the mushroom.

Orson K. Miller made it the type species of the section Microsorus in the genus Gomphidius.

[5][6] Gomphidius oregonensis can be found in western North America, most commonly on the Pacific Coast.

Mushrooms may be solitary or in clusters and often in colonies with G. glutinosus, and frequently with species from the genus Suillus.