claim: Pierce County, Washington is the location of the highest mountain of the Blue Mountains of the Pacific Northwest.
evidence: right  |  thumb  |  Tacoma -- seat of Pierce County. County. County ( United States ). right. image :Tacoma skyline and I-705 from the East 34th Street Bridge.jpg. Tacoma. Tacoma, Washington. Pierce County is a county in the U.S. state of Washington .. County. County ( United States ). county. County ( United States ). U.S. state. U.S. state. Washington. Washington ( state ). As of the 2010 Census , the population was 795,225 , making it the second-most populous county in Washington behind King County .. County. County ( United States ). county. County ( United States ). Washington. Washington ( state ). 2010 Census. 2010 United States Census. King County. King County, Washington. The county seat and largest city is Tacoma .. Tacoma. Tacoma, Washington. county. County ( United States ). county seat. county seat. Formed out of Thurston County on December 22 , 1852 , by the legislature of Oregon Territory , it was named for U.S. President Franklin Pierce .. County. County ( United States ). Franklin Pierce. Franklin Pierce. Thurston County. Thurston County, Washington. Oregon Territory. Oregon Territory. U.S. President. President of the United States. Pierce County is in the Seattle metropolitan area -LRB- formally the Seattle-Tacoma-Bellevue , WA metropolitan statistical area -RRB- .. County. County ( United States ). Tacoma. Tacoma, Washington. Seattle metropolitan area. Seattle metropolitan area. Seattle. Seattle. Bellevue. Bellevue, Washington. metropolitan statistical area. metropolitan statistical area. Pierce County is notable for being home to Mount Rainier , the tallest mountain and a volcano in the Cascade Range .. County. County ( United States ). Mount Rainier. Mount Rainier. volcano. volcano. Cascade Range. Cascade Range. Its most recent recorded eruption was between 1820 and 1854 .. There is no imminent risk of eruption , but geologists expect that the volcano will erupt again .. volcano. volcano. If this should happen , parts of Pierce County and the Puyallup Valley would be at risk from lahars , lava , or pyroclastic flows .. County. County ( United States ). Puyallup. Puyallup, Washington. lava. lava. The Mount Rainier Volcano Lahar Warning System was established in 1998 to assist in the evacuation of the Puyallup River valley in case of eruption .. Mount Rainier. Mount Rainier. Puyallup. Puyallup, Washington. Puyallup River. Puyallup River