The Oregon Army National Guard operates Camp Rilea as a National Guard and military training site, encompassing 1,886 acres of state-owned property located in northwest Oregon, in the Clatsop Plains, south of the city of Warrenton in Clatsop County.
The installation is configured in a north-south orientation, one mile wide by three miles long, with three miles of frontage on the Pacific Ocean.
The installation is surrounded mostly by private land holdings on the north, east and south with State Parks Lands bordering the northwest, southwest and western boundaries.