across the Clifton Channel to the southwest
across the Columbia River to the east
across the unnamed channel to the north
- Tenasillahe Island (Wikipedia)
Tenasillahe Island is an island in the Columbia River Estuary portion of the Columbia River in Clatsop County, Oregon. It is separated from the mainland and the unincorporated community of Clifton, Oregon by the Clifton Channel, and from nearby Welch Island by the Red Slough.