Tacoma wraps around Commencement Bay, with the Port of Tacoma and the industrial tide flats at the water's edge and neighborhoods climbing toward about 500 feet. Salt air, steady rain and a large stock of historic buildings give moisture-loving pests plenty of shelter.
Pierce County's largest city on the sound, Tacoma held 219,346 residents in the 2020 census, with roughly 50 square miles of land and nearly 13 more of water. The city straddles Commencement Bay on Puget Sound, rises from sea level to about 500 feet and looks out on Mount Rainier, which lies about 58 miles to the southeast. Point Defiance Park fills about 700 acres at the northern tip.
The Port of Tacoma is the largest port in Washington, and the tide flats once held pulp and paper mills that gave the city its nickname, the Tacoma Aroma. Preservation programs cover more than 1,000 historic properties in five overlay zones, so a good share of local buildings carry decades of wear. Annual rainfall is about 41 inches, enough to keep wood and soil damp much of the year.