Ross Lake is a large reservoir in the North Cascade mountains of northern Washington state, United States, and southwestern British Columbia, Canada. The lake runs approximately north–south, is 23 miles long, up to 1.5 miles wide, and the full reservoir elevation is 1,604 feet above sea level.
Location: Ross Lake National Recreation Area, Whatcom County, Washington, United States; · Skagit Valley Provincial Park, British Columbia, Canada
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