Route 100, also named
Manchester Road through St. Louis
County, is a state highway in
the U.S. state of Missouri.
Missouri at U.S. Route 50 to Interstate 55 in St.
The highway is long.
begins at US 50 in Linn. The highway heads north from Linn until it
encounters the Missouri
River, where it turns eastward to parallel the
river. At Chamois, Missouri, it serves as the northern terminus of Route 89. It then enters
County near Morrison and bridges the Gasconade River near its mouth at the
town. In the county seat, Hermann, Route 100 has a short concurrency with Route 19. The highway passes
Haven, in Franklin County, later. The highway then intersects Route 185 at its northern terminus, and
Route 47 in Washington. Near Gray Summit, Route 100 crosses over Interstate 44 two times, with an
interchange providing access to the freeway.
of Gray Summit, Route 100 crosses into St. Louis
County, entering the city limits of Wildwood at the same time.
Just north of the
intersection with Route T, the highway becomes an expressway
. In Wildwood, it has an interchange
with Route 109
. Route 100 then enters
Ellisville, where the expressway ends.
From here all
the way into St. Louis, the highway also carries the local name
Manchester Road. In Ellisville, Route 340
(Clarkson Road) meets its
southern terminus. Route 100 then proceeds into Ballwin. It then divides Manchester from Winchester, Missouri before wholly entering Manchester, where it has a
interchange (SPUI) with Route
141. Route 100 then runs through a swath of
unincorporated territory en route to Des Peres.
The route crosses over Interstate 270
, the St. Louis
beltway, in that town. East of Ellisville, Route 100 enters
Kirkwood; there, Manchester Road intersects Kirkwood Road
(the name given to Lindbergh
Boulevard in Kirkwood), which carries US 61/67. Route 100 then passes
through the smaller suburbs of Warson Woods, Glendale, Rock Hill, Brentwood, and Maplewood.
leaving Maplewood, Route 100 continues into the independent
City of St.
As Manchester Road crosses Vandeventer
Avenue, the highway becomes Chouteau Avenue. Route 100 continues
east on Chouteau Avenue towards downtown St. Louis. The route ends
just east of South Broadway, at the Interstate 55
overpass. Due to the
nearby east terminus of I-44, there is no interchange with I-55 at
the state route's terminus.
The Lewis and Clark Trail
Route 100 is part of the Lewis and Clark Trail.
From Kirkwood Rd in Kirkwood to three miles
(5 km) west of Wildwood is one section, where the trail turns off
on Route T. Route T will eventually end, once again, at Route 100
northwest of I-44 and continue down Route 100 all the way to five
miles (8 km) north of Linn (where Route 100 ends), and the Lewis
and Clark Trail turns off onto Route C.
the road between St. Louis and Gray Summit was the original U.S. Route 66
, though this was only
temporary until US 66 moved to its later location at what is now
Watson Rd (Route 366
. During, and
after US 66 was moved off Manchester Rd, the road remained part of
U.S. Route 50
for many years.