Tesson Ferry Road | ||||
Route information | ||||
Maintained by MoDOT | ||||
Length | 188 mi (303 km) | |||
Existed | 1922–present | |||
Major junctions | ||||
South end | ![]() | |||
North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Missouri | |||
Counties | Ripley, Carter, Reynolds, Iron, Washington, Jefferson, St. Louis | |||
Highway system | ||||
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Route 21 is a highway in eastern Missouri. Its northern terminus is at Route 30 in Affton. Its southern terminus is at the Arkansas-Missouri state line (where it continues as Highway 115). In the St. Louis area, it is known as Tesson Ferry Road, which was named after the 19th century proprietor of the ferry across the Meramec River. [1] Route 21 from the Meramec River to Route B, along with Route M, make up the Jefferson County Scenic Byway. [2] [3]
The section through northern Jefferson County, Missouri was considered dangerous. As a result, the road was rerouted and built to freeway standards. Construction to reroute the highway to just south of Hillsboro was completed on December 15, 2008 and Route 21 is currently freeway standard from Route 141 to Highway B. Plans to extend the freeway south to De Soto have been approved, but funds are lacking to complete this part of the project. [4]
Missouri Route 21 begins at the Arkansas state line, where it continues southward as Highway 115. As the highway enters Ripley County, it passes through the city of Doniphan, where it intersects US 160 and Route 142. Route 21 runs concurrent with US 160 for a short distance before separating east of Doniphan. [5]
Continuing northward, Route 21 enters Carter County, where it meets US 60 near Van Buren. The highway briefly overlaps with US 60 before diverging and heading northeast into Reynolds County. In Reynolds County, Route 21 passes through Ellington, where it intersects Route 72 and continues northward toward Iron County. [6]
Upon reaching Iron County, Route 21 enters Arcadia and Pilot Knob, where it intersects Route 221. The highway then continues northward, passing through Washington County and reaching Potosi, where it meets Route 8. Further north, Route 21 intersects Route 47 near Old Mines before entering Jefferson County. [7]
In Jefferson County, Route 21 passes through De Soto, where it intersects Route 110. The highway continues northward, reaching Barnhart, where it meets Route M and Route MM. As Route 21 enters the St. Louis metropolitan area, it becomes a major arterial road known as Tesson Ferry Road, and passes through Concord and intersecting I-270. The highway then reaches its northern terminus at Route 30 in Affton. [8]
County | Location | mi | km | Destinations | Notes |
---|---|---|---|---|---|
Ripley | | 0.000 | 0.000 | ![]() ![]() | Arkansas state line |
| 8.578 | 13.805 | ![]() ![]() | Southern end of Route 142 overlap | |
| 9.825 | 15.812 | ![]() ![]() | Southern end of US 160 overlap | |
Doniphan | 11.714 | 18.852 | ![]() ![]() | Northern end of Route 142 overlap | |
| 13.677 | 22.011 | ![]() ![]() | Northern end of US 160 overlap | |
Carter | | 36.031 | 57.986 | ![]() ![]() | Southern end of US 60 overlap |
| 45.608 | 73.399 | ![]() ![]() ![]() ![]() | Northern end of US 60 overlap; Southern end of Route 34 overlap | |
Reynolds | | 48.959 | 78.792 | ![]() ![]() | Northern end of Route 34 overlap |
Ellington | 65.112 | 104.788 | ![]() ![]() | ||
| 77.088 | 124.061 | ![]() ![]() | Southern end of Route 72 overlap | |
| 85.027 | 136.838 | ![]() ![]() | Southern end of Route 49 overlap | |
Iron | | 98.252 | 158.121 | ![]() ![]() | Northern end of Route 49 overlap |
Arcadia | 107.967 | 173.756 | ![]() ![]() | Northern end of Route 72 overlap | |
Pilot Knob | 110.072 | 177.144 | ![]() ![]() | ||
| 119.405 | 192.164 | ![]() ![]() | Southern end of Route 32 overlap | |
Washington | Caledonia | 123.672 | 199.031 | ![]() ![]() | Northern end of Route 32 overlap |
Potosi | 135.913 | 218.731 | ![]() | ||
Old Mines | 142.085 | 228.664 | ![]() ![]() | Southern end of Route 47 overlap | |
| 147.011 | 236.591 | ![]() ![]() | Northern end of Route 47 overlap | |
Washington State Park | 149.523 | 240.634 | ![]() ![]() | ||
150.912 | 242.869 | ![]() ![]() | |||
Jefferson | | 161.379 | 259.714 | ![]() ![]() | |
Hillsboro | 165.177 | 265.827 | ![]() ![]() | Southern end of Route B overlap | |
| 165.547 | 266.422 | ![]() ![]() | Northern end of Route B overlap; southern end of freeway | |
Hillsboro | 167.854 | 270.135 | ![]() | ||
| 169.236 | 272.359 | Hayden Road | ||
| 172.575 | 277.733 | Old Route 21 - Goldman | ||
| 175.162 | 281.896 | Old Route 21 / Schenk Road | ||
Otto | 177.733 | 286.034 | ![]() ![]() | ||
| 180.341 | 290.231 | Old Route 21 - Shady Valley | ||
| 184.555 | 297.012 | Old Route 21 - Meramec Heights | Southbound exit and northbound entrance | |
| 185.469 | 298.483 | ![]() | Interchange; northern end of freeway | |
| 185.864 | 299.119 | Meramec Bottom Road | ||
St. Louis | Concord | 190.517 | 306.607 | ![]() | I-270 exit 2 |
191.717 | 308.539 | ![]() ![]() ![]() | |||
Affton | 194.126 | 312.416 | ![]() | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
Location | Hillsboro, Jefferson County |
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Business 21 follows the old alignment of Route 21 through the city of Hillsboro. It begins at the intersection of Route 21 and Highway B on the southern edge of the city, and continues north to the intersection of Route A and Old Route 21, where it ends. Business 21 is the only way one can now reach Route BB, as the rerouting of Route 21 bypasses the road.
Media related to Missouri Route 21 at Wikimedia Commons