Former U.S. 320

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U.S. 320 was commissioned in 1926 along a 26 mile long route between U.S. 87W in Riverton and U.S. 20 in Shoshoni. It was downgraded to Wyoming Highway 320 in 1938 because it was so short.

U.S. 287 was redefined in 1940 to avoid Riverton and follow a more direct route between Lander and Dubois. At that time, WY 320 was extended southwest through Hudson to Lander, and the WY 287 designation was moved to the road between Riverton to Diversion Dam Junction. WY 320 remained designated for a decade after these realignments.

With the western extension of U.S. 26 across Wyoming made in 1950, a portion of WY 320 was decommissioned. The section between Lander and Riverton remained as WY 320 until 1954, when WY 789 was commissioned in Wyoming. U.S. 26 and WY 789 remain along the old route of U.S. 320, while WY 789 alone replaces the route of old WY 320.



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    Page Updated 09-22-2005.

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