Page "San Juan Islands" Paragraph 38

Rosario Strait is also a major shipping channel.

More than 500 oil tankers pass through the strait each year, to and from the Cherry Point Refinery and refineries near Anacortes.

The strait is in constant use by vessels bound for Cherry Point, Bellingham, Anacortes, and the San Juan Islands.

Vessels bound for British Columbia or Alaska also frequently use it in preference to the passages farther west, when greater advantage can be taken of the tidal currents.