Britannica
Sources used in this answer
When did Robert Gray sail up the Columbia River?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Columbia River
Columbia River Gorge, Oregon-Washington border.
Captain Robert Gray sailed into the Columbia River in May 1792. During this second voyage, he successfully navigated over the river's bar and named the waterway after his ship, the Columbia, which established a significant claim for the United States in the Pacific Northwest.12