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PublicHermosa, South Dakota

SD-40 + Old Hill City Road

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Created by

2012legazz

Distance

25.8 mi

Duration

55m

Checkpoints

5

Created

JUL 5, 2026

The road

SD-40 + Old Hill City Road in Hermosa, South Dakota is graded at 220 corners, about 8.5 for every mile you drive. 19 of them are genuinely tight, and the sharpest turns in at a 19 m radius.

Graded corners
220
Tight (1–2)
19
Tightest radius
19 m
Corners per mile
8.5

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

5

  1. #01

    13 West Ct

  2. #02

    13414 South Dakota Highway 40

  3. #03

    Old Hill City Road

  4. #04

    12618 Old Hill City Road

  5. #05

    SD-40 + Old Hill City Road

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