Wyoming Highway 321
| Interstate 25 Business | ||||
WYO 321 highlighted in red | ||||
| Route information | ||||
| Maintained by WYDOT | ||||
| Length | 3.34 mi (5.38 km) | |||
| Major junctions | ||||
| South end | I-25 / US 87 / WYO 211 in Chugwater | |||
| WYO 313 in Chugwater | ||||
| North end | I-25 / US 87 north of Chugwater | |||
| Location | ||||
| Country | United States | |||
| State | Wyoming | |||
| Counties | Platte | |||
| Highway system | ||||
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Wyoming Highway 321 (WYO 321) is a 3.34-mile-long (5.38 km) north–south Wyoming State Road that is partially known as TY Basin Road and 1st Street and was once part of the Old Yellowstone Highway. WYO 321 travels from the junction with I-25/US 87/WYO 211, meets Wyoming Highway 313, and heads north to I-25/US 87 at exit 57 just north of Chugwater (Ty Basin Interchange). Wyoming Highway 321 was originally U.S. Highway 87, and its interchanges with I-25 are signed as I-25 Business.