Joint Base Lewis-McChord: I-5 @ MP 119.5: Constitution Dr

1 47.10°, -122.61°
About location

Joint Base Lewis-McChord lies along the southern Puget Sound lowlands, where wooded glacial terrain meets the heavily used Interstate 5 corridor. This vast U.S. Army and Air Force installation extends across Pierce and Thurston counties between Tacoma and Olympia. It was created in 2010 through the merger of Fort Lewis and McChord Air Force Base, bringing two long-established military communities under one command. The base remains a defining presence in the regional economy and transport network, while I-5 carries civilian, military and freight traffic through the corridor.

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