| State Trunk Highway 138 | ||||
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| Route information | ||||
| Maintained by WisDOT | ||||
| Length: | 13.23 mi (21.29 km) | |||
| Major junctions | ||||
| South end: |
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| North end: |
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| Location | ||||
| Counties: | Rock, Dane | |||
| Highway system | ||||
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State Trunk Highway 138 (often called Highway 138, STH 138 or WIS 138) is a state highway in the U.S. state of Wisconsin. It runs west–east between Oregon and Stoughton and north–south between Stoughton and Cooksville.