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The Atlas/South Dakota/Needles Highway (SD-87)

Needles Highway (SD-87)

Legion Lake to Sylvan Lake, 14 mi. **A genuine bucket-list tight technical road.** Threads between granite "needle" spires through two narrow single-lane tunnels (Needles Eye Tunnel 8'0" wide; Iron Creek Tunnel 8'9"). Sharp switchbacks, hairpins. **Measure your bagger's bar width and mirror clearance** — most Road Glides fit. **Closed in winter (typically late October/early November through April).**

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High point
Scenic
Road type
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// Nearby & related
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