| Wyoming Highway 321 | ||||
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| Ty Basin Road (Old Yellowstone Highway) |
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| Route information | ||||
| Maintained by WYDOT | ||||
| Length: | 2.75 mi (4.43 km) | |||
| Major junctions | ||||
| South end: |
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| North end: |
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| Location | ||||
| Counties: | Platte | |||
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Wyoming Highway 321 is a north–south Wyoming State Road known as Ty Basin Road and was part of the Old Yellowstone Highway. WYO 321 travels from Wyoming Highway 313 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.
WYO 321 begins at a diamond interchange with concurrent highways I-25 and US 87 just north of Chugwater city limits. The highway turns from the interchange to the south and parallels I-25 and a rail line as it crosses into town. Once in town the highway intersects a number of city streets before coming to an end at an intersection with .
The entire route is in Chugwater, Platte County.