| State: | WY |
| Type: | WY |
| Route: | 138 |
| Maint: | Wind River Indian Reservation |
| Alternate Name: | Rendezvous Road |
| Map Custom: | yes |
| Map Notes: | WYO 138 highlighted in red |
| Length Mi: | 8.14 |
| Length Round: | 2 |
| Length Ref: | [1] |
| Established: | ? |
| Decommissioned: | 2010 |
| Direction A: | West |
| Terminus A: | east of Hudson |
| Direction B: | East |
| Terminus B: | in St. Stephens |
| Counties: | Fremont |
| Previous Type: | WY |
| Previous Route: | 137 |
| Next Type: | WY |
| Next Route: | 139 |
Wyoming Highway 138 (WYO 138) was a 8.14-longNaN-long east-west (southwest-northeast) Wyoming State Road in central Fremont County.
Wyoming Highway 138 began on its western end at Wyoming Highway 789 east of Hudson. WYO 138 proceeded in a northeasterly direction, and traveled through the community (CDP) of Arapahoe. Just northeast of Arapahoe, WYO 138 reached Wyoming Highway 137 in the unincorporated community of St. Stephens where it ended.[2] Together with WYO 137, Highway 138 provided an alternate to WYO 789 by staying closer to the Popo Agie River.[2]
A resolution to relinquish the highway to the Bureau of Indian Affairs was approved by the Transportation Commission of Wyoming at a meeting on December 9, 2010.[3]