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100 years of US routes: 1926-2026
US route endpoint
North entrance to Yellowstone National Park
There are no US highways through Yellowstone National Park, so US 89 is comprised of two segments. The north segment is entirely in Montana; it runs from Piegan (on the Canada border) to Gardiner (at the North entrance of Yellowstone). As of 2024, the last southbound US 89 marker was about 20 miles north of Gardiner. National Park signage in town makes it clear that the highway through Yellowstone does not carry the US 89 designation:
Google Map Street View, Aug. 2024
That's Electric Peak on the horizon, and in the middle ground is the Roosevelt Arch, an old stone monument at the original north entrance to the Park (which can still be used, but now there is another entrance that bypasses the Arch):
Elbert, Jul. 2005
Travelers can go all the way through the Park using any road they choose, but they will not see a US 89 sign (nor any other numbered highway designations) until they exit the Park. Not far beyond the Arch, visitors are greeted with this sign:
Elbert, Jul. 2005
US 89 resumes again at Yellowstone's south entrance, although southbound travelers will not observe any signage to that effect until they reach Jackson (on the far side of Grand Teton Nat'l. Park, some 60 miles beyond Yellowstone's south entrance).
Heading north out of Yellowstone from the north gate in Gardiner, historically the first US 89 sign a driver would see was the ugly homemade one shown in the first photo below, but both of those signs were replaced with the single sign shown in the second photo, which in turn was replaced by the one in the third photo:
Elbert, Jul. 2005
Elbert, Jul. 2009
GMSV, Aug. 2024
The road runs east along the Park boundary for about two blocks, and then travelers are directed to turn left on 2nd Street, into the town of Gardiner:
Elbert, Jul. 2005
Taking that turn, formerly the first northbound confirming marker was posted immediately (as pictured in the next photo), but as of 2024 no US 89 sign is posted until the curve on the far side of the Yellowstone River bridge (visible in the distance):
Elbert, Jul. 2009
Research and/or image credits: Chris Elbert; Dale Sanderson
Page originally created 2005;last updated May 3, 2025.
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