In 1836 a Russian named Glasunoff entered the delta of the Yukon, ascending the river as far as the mouth of the Anvik River. In 1838 Malakoff extended the exploration as far as Nulato, where he established a Russian post and placed Notarmi in command.

When the garrison returned to St. Michael's on account of the failure of provisions, the following winter, natives destroyed the fort and all buildings which had been erected. It was rebuilt and again destroyed in 1839. In 1841 it once more arose under Derabin, who remained in command. The following year Lieutenant Zagoskin reached Nulato, ascending to Nowikakat in 1843.

The Russians were therefore established on the lower Yukon several years before the English established themselves upon the upper river.

In 1840 Mr. Robert Campbell was sent by Sir George Simpson to explore the Upper Liard River. Mr. Campbell ascended the river to its head waters, crossed the mountains, and descended the Pelly River to the Lewes, where, eight years later, he established Fort Selkirk.

This famous trading post was short-lived. In 1851 it was attacked by a band of savage Chilkahts and was surrendered, without resistance, by Mr. Campbell, who had but two men with him at the time. They were not molested by the Indians, who plundered and burned the warehouses and forts.

Only the chimneys of the fort were found by Lieutenant Schwatka in 1883. As late as 1890 this point was considered the head of navigation on the Yukon.

In 1847 Fort Yukon was established by Mr. A. H. McMurray, of the Hudson Bay Company. Following McMurray and Campbell, came Joseph Harper, Jack McQuesten, and A. H. Mayo, who established a trading post on the Yukon at Fort Reliance, six miles below the mouth of the Klondike.

In 1860 Robert Kennicott reached Fort Yukon, and in the following spring descended to a point that was for several years known as "the Small Houses"—the most attractive name in the Yukon country. In 1865 an expedition was organized in San Francisco by the Western Union Telegraph Company for the purpose of building a telegraph line from San Francisco to Behring Strait—which was to be crossed by cable to meet the Russian government line at the mouth of the Amoor River. One party, headed by Robert Kennicott, was sent by ocean to the mouth of the Yukon; and another, in charge of Michael Byrnes, up the inside route to the Stikine River. Going from that river to the head waters of the Taku, they followed the chain of lakes and the Hootalinqua River to the Lewes, which they reached on the Tahco Arm of Lake Tagish. At that time it became known that the Atlantic cable had proven to be a success, and the daring and hazardous northern project was abandoned.

As late as the date of this expedition it was not determined positively whether the Kwihkpak was one of the mouths of the Yukon, or a separate river. Upon the recall of the telegraph expedition, the only portion of the great river that had not been explored was the short distance between Lake Tagish and Lake Lebarge.

There have been several claimants for the honor of having been the first white man to cross the divide between Lynn Canal and the head waters of the Yukon. The first was a mythological, nameless Scotchman employed by the Hudson Bay Company, who is supposed to have reached Fort Selkirk in 1864, and to have proceeded alone over the old "grease-trail" of the Chilkahts to Lynn Canal. He fell into the hands of the Indians and was held until ransomed by the captain of the Labouchere. Because he had long, flowing locks of red hair, he was supposed to be a kind of white shaman, and his life was spared by the savages. This story is doubted by many authorities.