Mount Fairweather is a mountain located 20 km east of the Pacific Ocean on the Canada–United States border. With an elevation of 4,653 metres, it is the tallest mountain in British Columbia and the seventh-tallest mountain in Alaska. Most of the mountain lies within Glacier Bay National Park and Preserve in the City and Borough of Yakutat, Alaska, though the sum…Mount Fairweather is a mountain located 20 km east of the Pacific Ocean on the Canada–United States border. With an elevation of 4,653 metres, it is the tallest mountain in British Columbia and the seventh-tallest mountain in Alaska. Most of the mountain lies within Glacier Bay National Park and Preserve in the City and Borough of Yakutat, Alaska, though the summit borders Tatshenshini-Alsek Provincial Park, British Columbia.