South Dakota, United States
Iron Mountain Road
Pigtail bridges and Mount Rushmore framing tunnels.
Keystone → Custer
- Distance
- 25 mi
- Level
- Medium
- Type
- Mountain
- Season
- May - October
Highlights
- Mount Rushmore views
- Pigtail bridges
- Wildlife loop connection
Must ride
★ 7.9/ 10
Risks
Fuel stops
Food stops
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