Oso is small Arlington community in between the city of Arlington and Darrington. Oso is know for is Cascade foothills settings, views of Glacier Peak and White Horse, flowing waters of the Stillaguamish's North Fork and private home settings.

Recently, the Oso community has been the victim of a major natural disaster. The Oso mudslide has been a tragic event for the Steelhead Dr residents. There are many opportunities to help out through volunteering, donations, and support.