The department shall designate United States highway 12 from the South Dakota border to the Montana border as the Yellowstone trail and at a minimum shall place signs along the highway designating that name and may use appropriate signs donated to the department.
N.D. Cent. Code § 24-01-55
Yellowstone trail - United States highway 12
Official source: North Dakota Legislative Branch. Reproduced from public-domain North Dakota statutes; confirm against the official source for the current text. Not legal advice.