Pierre Laclede

Historical marker location:

50 North Leonor K Sullivan Boulevard, Saint Louis, Missouri

( Marker is on North Leonor K Sullivan Boulevard, 0.4 miles south of Laclede's Landing Boulevard, on the left when traveling south.)

Marker installed: 1923

The Missouri River is the longest river in North America, stretching for 2,341 miles from its source in Montana to its mouth in the Gulf of Mexico.