U.S. Bicycle Route 21
| Route information | ||||
|---|---|---|---|---|
| Length | 1,043.4 mi (1,679.2 km) | |||
| Existed | 2015–present | |||
| Major junctions | ||||
| North end | USBR 30 in Cleveland | |||
| 
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| South end | Atlanta, GA near the North Avenue station (MARTA) | |||
| Location | ||||
| Country | United States | |||
| States | Ohio, Kentucky, Tennessee, Georgia | |||
| Highway system | ||||
| 
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U.S. Bicycle Route 21 (USBR 21) is a north–south United States Bicycle Route that travels through Ohio, Kentucky, Tennessee, and Georgia in the United States.