[1] It is the second-largest species of terrestrial slug in the world, growing up to 25 centimeters (9.8 in) long.

[1] As of 2021, it is the most commonly observed species in the genus Ariolimax on the citizen science website iNaturalist.

[2] An important function of this particular species is the role it plays in seed dispersion.

[3] Ariolimax columbianus can grow up to 25 centimeters long, making it the second largest terrestrial slug in the world.

[4] Ariolimax columbianus is found from Alaska, United States and British Columbia, Canada in the north down through Idaho, Washington, and Oregon to Southern California, with the highest concentration in California.