Needles Highway, designated South Dakota State Route 87, is a 14-mile scenic road through the heart of Custer State Park in the Black Hills, celebrated for its passage through ancient granite spires, narrow rock tunnels, and subalpine meadows. The road was engineered by Peter Norbeck in the 1920s specifically to maximize scenic impact, curving back on itself repeatedly and threading through slots in the granite barely wide enough for a single vehicle. Three tunnels punctuate the route; the most photographed is the Eye of the Needle tunnel — a narrow rectangular cut framed by a soaring spire beyond. Cathedral Spires overlook, approximately midway along the route, presents a sweeping view across a cluster of granite pinnacles rising 300–400 feet from the surrounding ponderosa pine forest; a short 0.5-mile round-trip trail descends from the parking area for close inspection of the spire bases. The northern terminus of Needles Highway connects to the Iron Mountain Road at Sylvan Lake, and the southern end drops toward the Wildlife Loop Road and the park's grassland zone. The road is a popular motorcycle touring route in the Black Hills season and appears on most regional motorcycle itineraries. Mule deer and mountain goats are occasionally spotted along the rocky margins. RVs, trailers, and large trucks cannot safely navigate the tunnels or hairpin turns — the maximum recommended vehicle length is approximately 20 feet. Standard passenger cars and motorcycles navigate the route comfortably throughout the operating season from May through October, with the caveat that winter snow may close the road without notice between November and April.
Good to know
- Hours
- Open year-round (may close in winter snow)
- Best time
- morning or late afternoon light
Location
SD-87, Custer, SD 57730
43.7785, -103.5022 View on map
Highlights
- Three narrow granite tunnels including the Eye of the Needle framed by a towering spire
- Cathedral Spires overlook with 300–400-ft granite pinnacles and a 0.5-mile access trail
- 14 miles of hairpin curves engineered in the 1920s to thread through granite formations
- Bison, deer, and mountain goats occasionally sighted along rocky road margins
- Prime motorcycle touring route connecting Sylvan Lake to the Wildlife Loop Road
Tips for visiting
- Vehicles longer than ~20 feet (RVs, trailers) cannot fit through the tunnels — check vehicle length before entering the route
- The best photo of the Eye of the Needle tunnel is taken from the eastern approach; Cathedral Spires overlook lot is the top parking stop
- The road may close without notice in heavy winter snow — check South Dakota 511 before visiting October through April
- Needles Highway is included in the Custer State Park vehicle pass ($20–35); no separate entry fee applies
- Morning (7–9am) and late afternoon (4–6pm) light strikes the granite spires most dramatically for photography
When to visit
Mid-morning (9–11am) and late afternoon (4–6pm) offer the best light on the granite spires. Fall foliage from late September through October adds color contrast to the rock faces. Avoid summer weekend afternoons when traffic queues can form near the narrowest tunnels.
Accessibility
Needles Highway is a paved road accessible by standard passenger vehicle throughout the operating season. The Cathedral Spires overlook parking area is accessible by car; the short trail to the spire bases involves uneven rocky terrain not suitable for wheelchairs. Tunnel viewing requires no hiking — all three tunnels are driven through.
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Frequently asked questions
Can RVs or large trailers drive Needles Highway?
No — the tunnels and sharp curves are impassable for vehicles longer than approximately 20 feet. Larger rigs should use alternate routes such as US-385 through the Black Hills.
How long does it take to drive Needles Highway?
The 14-mile route takes 45–90 minutes with stops at Cathedral Spires overlook and the tunnel pull-outs. Add 30 minutes if hiking the short trail to the Cathedral Spires base.
Is Needles Highway open year-round?
The road is generally open year-round but closes when heavy snow accumulates. Summer (June–September) is the most reliable period; check South Dakota 511 for current conditions in shoulder seasons.