It drains a small area of the foothills of the Coast Range near the mouth of the Columbia River.

It rises southwest of Astoria in a northern Clatsop County at 46°06′29″N 123°40′29″W / 46.108165°N 123.674857°W / 46.108165; -123.674857 (Wallooskee River source).

The Wallooskee enters Youngs River from the east at the south end of Youngs Bay, approximately 2 miles (3.2 km) south of Astoria.

[1] Although there is not a formal settlement by the name of Walluski, Oregon, the Olney-Walluski area is considered a community by local residents and the Walluski area was a census precinct as recently as 1950.

[6] The school was located near Oregon State University's John Jacob Astor Agricultural Experiment Station, that was later used as the Clatsop Community College farm and today is the site of the Clatsop County Fairgrounds.