US 26 enters
Lincoln County from Idaho and intersects
US 89 just outside Alpine, where the two routes
run concurrenly for , crossing into
Teton County and intersecting
US 189 and
US 191 at
Hoback Junction. The four routes are then cosigned for to
Jackson, where US 189 ends in Jackson and the other three highways continue their concurrency for through
Grand Teton National Park up to
Moran. At Glacier View Turnout, a view of
Teton Glacier, on the north of
Grand Teton, can be seen. At Moran, the routes meet
US 287 where US 89, US 191, and US 287 continue north to Yellowstone National Park; however, US 26 turns east and begins its concurrency with US 287. Crossing the
Continental Divide at
Togwotee Pass and entering
Fremont County, US 26 and US 287 pass through
Dubois, the end of the
Wyoming Centennial Scenic Byway, before US 26 and US 287 separate at Diversion Dam Junction, about west of
Morton. US 26 continues to
Riverton where it meets
Wyoming Highway 789 (WYO 789), where the two routes are cosigned for to
Shoshoni, where WYO 789 departs and US 26 begins its concurrency with
US 20. The two routes travel continue to
Casper, where they follow a bypass north of Casper, the eastern half of which is concurrent with
Interstate 25 (I-25) and
US 87 for . US 20, US 26, and US 87 parallel I-25 for from Casper to
Glenrock; east of Glenrock, US 26 (along with US 20 and US 87) is cosigned on I-25 for . At Dwyer Junction, US 26 departs I-25, where it turns east to continue along the Old
Oregon Trail. US 26 passes through
Guernsey,
Fort Laramie,
Lingle, and Torrington before entering Nebraska.
US 85 is concurrent with US 26 for between Lingle and Torrington. ==Major intersections==