Pierce County, Washington is the location of the highest mountain of the Blue Mountains of the Pacific Northwest.
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 .. Cascade Range. Cascade Range. Pacific Northwest. Pacific Northwest. Washington. Washington ( state ). It is a large active stratovolcano located 54 mi south-southeast of Seattle , in the Mount Rainier National Park .. Mount Rainier National Park. Mount Rainier National Park. stratovolcano. stratovolcano. Seattle. Seattle. It is the most topographically prominent mountain in the contiguous United States and the Cascade Volcanic Arc , with a summit elevation of 14411 ft.. Cascade Volcanic Arc. Cascade Volcanic Arc. topographically prominent. Topographic prominence. contiguous United States. contiguous United States. Mt. Rainier is considered one of the most dangerous volcanoes in the world , and it is on the Decade Volcano list .. Decade Volcano. Decade Volcano. Because of its large amount of glacial ice , Mt. Rainier could produce massive lahars that could threaten the entire Puyallup River valley , and poses a grave threat to the southern sections of the Seattle metropolitan area , a city of over 650,000 people with more than 3.7 million living in its metropolitan area .. Seattle. Seattle. Puyallup River. Puyallup River