Which two state highways along the Mississppi river were named in honor of the years Lewis and Clark trekked through present day South Dakota?

Illinois Highway 3 is known as the Lewis and Clark Highway, as well as the Great River Road. It parallels the Mississippi, and is about a 3 minute walk from my house. Lewis and Clark started their journey about 10 miles from my house, in Wood River, Illinois. This was their last camp before crossing the Mississippi.
There are many US highways known as Lewis & Clark, but this is the only state highway that I know about that fits your conditions.

[This message was edited by Doriangreyed on 09-05-03 at 08:23 PM.]
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Later edit.

Missouri Route 367

Route 367 is a seven-mile long highway in the metropolitan St. Louis, Missouri, United States area. It is also known as Lewis & Clark Boulevard. Its northern terminus is U.S. Route 67 near Black Jack and its southern terminus is at the I-70 bridge over Riverview Blvd. before Riverview Blvd. becomes Bircher Blvd. in St. Louis. It was originally part of U.S. 67. - Wikipedia.

This message has been edited. Last edited by: DorianGreyed,

yes thanks Dorian.