Determined at last to support their claim to the Pacific coast of North America, the Spaniards began to realize the necessity of exploring it more fully and of founding settlements. It was their plan to take possession of the whole region between Mexico upon the south and the Russian trading posts along the shores of Alaska. As exploration by land was impossible because of mountain ranges and deserts, the Spanish adventurers were forced to rely upon the ocean, with all its uncertainties of storm and contrary winds.
Between 1774 and 1779 voyages were made as far north as Queen Charlotte's Island, in latitude 54°. A station was established and held for many years at Nootka Sound, upon the west coast of Vancouver Island. The first expedition passed the Strait of Juan de Fuca apparently without seeing it, although there was a rumor to the effect that a broad opening into the land had been discovered by a certain Juan de Fuca in 1592, while he was exploring in the employ of Spain. The latitude of this opening, as he gave it, nearly corresponds to that of the strait which now bears his name.
For many years the attempt to discover a passage around the northern part of America engaged the early navigators upon both the Atlantic and Pacific oceans. Their desire to find an easy route to India spurred them to constant effort. For a time it was believed that such an opening actually existed, and mariners went so far as to give it a name, calling it the Straits of Anian. The reputed discoveries of Juan de Fuca materially strengthened the general belief in a passage to the northward of America.
Vizcaino, in his voyage of 1603, reached latitude 43° north and thought that he had discovered a great river flowing into the Pacific Ocean. This opening, although south of the point supposed to have been reached by Juan de Fuca, was believed for a time to be the entrance to the long-sought Straits of Anian. During the latter part of the seventeenth century California was represented upon the Spanish maps as an island having Cape Blanco, which Vizcaino discovered and named, as its northern point, and separated from the mainland by an extension of the Gulf of California northward.
To return now to the Spanish explorations, in the latter part of the seventeenth century we find that Heceta, following the first expedition, succeeded in getting as far as Vancouver Island, where, having been parted from an accompanying ship by a storm, he turned southward, passing the Strait of Juan de Fuca and keeping close by the shore. In latitude 46° 17' he found an opening in the coast from which a strong current issued. He felt sure that he had discovered the mouth of some large river. Upon the later Spanish maps this was called Heceta's Inlet, or River of San Roque. A glance at the map will show how closely the latitude given corresponds to the mouth of the river which was discovered later by Captain Gray and named, after his ship, the Columbia.