Business Loop I-44 - Grays Summit, Pacific and Eureka

The easternmost business route for I-44 travels 8.94 miles of Historic U.S. 66 between Exits 257 and 261. The route follows Osage Street through unincorporated Grays Summit, just to the south of I-44, to western reaches of the Pacific city limits. Ramps from I-44 east at Exit 256 provide a second access point to Business Loop I-44 ahead of the Pacific street grid.

Interstate 44 shifts northward from Pacific as Historic U.S. 66 parallels two railroad lines across a valley to the south. The two routes come together again at Exit 261 in west Eureka, adjacent to the Six Flags St. Louis theme park.

As approved by the American Association of State Highway and Transportation Officials (AASHTO), Business Loop I-44 at Pacific and Eureka was extended west to Grays Summit via South Outer Road on May 30, 2003.