Distance
119.8 mi
Duration
1h 52m
Checkpoints
2
Created
JUL 5, 2026
About
The longest technically straight road with minor deviations for geographical features like river crossings.
The road
ND-40 The Longest Straight Road in the US in Horace, North Dakota is graded at 42 corners, about 0.4 for every mile you drive. Nothing on it is truly tight: the sharpest corner still opens to 116 m, so it flows rather than fights. The longest straight runs 43.6 miles, so there is room to breathe between the technical sections.
- Graded corners
- 42
- Tight (1–2)
- 0
- Tightest radius
- 116 m
- Corners per mile
- 0.4
Corners are graded from the route’s own geometry on the rally 1–6 scale, where 1 is a hairpin. Road & Rally calls them out as you drive.
Checkpoints
2
- #01
North Dakota Highway 46
- #02
ND-40 The Longest Straight Road in the US
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