• Looking up at the Gateway Arch

    Jefferson

    National Expansion Memorial Missouri

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  • I-44 Ramp at Walnut St. to Close This Weekend

    The Missouri Department of Transportation will close the ramp from eastbound I-44 to Walnut this weekend. Crews will close the ramp (Exit 291B) into downtown at 9 a.m. Friday, July 25 so crews can remove the remainder of the old ramp from the Poplar St. More »

How to Contact Us

Mail
Superintendent
Jeffersonson National Expansion Memorial
11 North 4th Street
St. Louis, MO 63102

Phone
Park Headquarters (314)655-1600
Fax (314)655-1639

Email

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Did You Know?

Black dog

Meriwether Lewis took his Newfoundland dog Seaman on the Lewis and Clark expedition? Seaman made the entire trip with the Corps and is credited with waking the members when a bison entered the camp and almost trampled them. Click here to learn more about Lewis and Clark. More...