Claim: Pierce County, Washington is the location of the highest mountain of the Blue Mountains of the Pacific Northwest.
Evidence: Pierce County is notable for being home to Mount Rainier , the tallest mountain and a volcano in the Cascade Range.
Mount Rainier -LRB- pronounced : -LSB- reɪˈnɪər -RSB- -RRB- , Mount Tacoma , or Mount Tahoma is the highest mountain of the Cascade Range of the Pacific Northwest , and the highest mountain in the U.S. state of Washington.