Needles Highway and Sylvan Lake

State Route 87 through the Needles is a narrow, twisting, two-lane mountain road, and it does not pretend to be anything else. It runs about fourteen miles inside Custer State Park, a 71,000-acre preserve that is one of the largest state parks in the country, and it climbs to roughly 6,400 feet in elevation among the granite formations. It is a slow road on purpose. Sharp switchbacks double back on themselves, pigtail curves loop around like a corkscrew, and the pavement bends constantly to fit itself between the rocks rather than blast a straight line through them.

The signature feature is the tunnels. The road passes through several one-lane tunnels cut straight through the granite, and the most famous of them, the Needles Eye Tunnel, is only about eight feet four inches wide. That is barely wider than a single car, which is exactly why large vehicles cannot fit through. The tunnels frame the scenery like a window, and just past the Needles Eye stands the rock spire it is named for, a tall pillar with a slender opening near the top worn through by centuries of wind, rain, and freezing.

What makes the Needles Highway special is how close the stone comes. You do not view these formations from a distant overlook, you drive right up into them, with granite towers pressing in on both sides of the car. Pullouts and small parking areas let you stop and crane your neck at the spires or set out on a trail. And near the northern end the road delivers you to Sylvan Lake, where still water mirrors the boulders and pines, and the trail up Black Elk Peak, the highest summit east of the Rocky Mountains, begins.

The Needles Highway sits in the southern Black Hills, and most travelers reach it from Rapid City, about thirty miles to the north. Coming from Rapid City, take U.S. Route 16 southwest toward the town of Custer, then follow State Route 89 and the park roads into Custer State Park, where State Route 87, the Needles Highway, begins. Many people simply follow signs for Custer State Park and the Needles.

You can drive the Needles Highway in either direction. From the south and east, State Route 87 branches off U.S. Route 16A inside Custer State Park and climbs north into the granite, ending at Sylvan Lake. From the north, near the town of Hill City, you can come in on State Route 87 or connect through State Route 244 near Mount Rushmore, then drop down to Sylvan Lake and drive the Needles from that end.

Because the Needles Highway is one leg of the larger Peter Norbeck National Scenic Byway, many visitors pair it with the byway's other famous roads, especially Iron Mountain Road with its pigtail bridges and framed views of Mount Rushmore, and the park's Wildlife Loop. Together they make a full and unforgettable day of driving in the Black Hills.

The Needles Highway was the dream of Peter Norbeck, a South Dakota governor and later United States senator who loved the Black Hills and wanted others to see their most spectacular corners from behind the wheel. Norbeck personally scouted the route through the granite spires, marking the course on foot and on horseback, choosing a path that engineers of the day insisted could not be built. He wanted the road to move through the rock rather than around it, and he was willing to make the road slow and narrow to keep the scenery close.

Construction finished in 1922. Crews cut the roadbed by hand through some of the hardest granite in the region and drilled the one-lane tunnels straight through the stone, work so difficult that the tunnels were kept just wide enough for a single vehicle. The road runs through Custer State Park, which South Dakota had established a few years earlier, and the Needles Highway quickly became the park's showpiece drive, a road built as much to be experienced as to get anywhere.

The Needles Highway later became one leg of the Peter Norbeck Scenic Byway, named in honor of the man who imagined it. That byway, a loop of connected roads that includes the Needles Highway, Iron Mountain Road, and the park's Wildlife Loop, was designated a National Scenic Byway by the United States Department of Transportation in 1996, a federal recognition reserved for roads with outstanding scenic, natural, and historic qualities. The honor placed this hand-built mountain road among a small group of America's most treasured drives.

The rocks themselves are far older than any road. The needles are made of granite that formed deep underground more than a billion years ago, when molten rock cooled slowly beneath the surface. Over immense stretches of time the softer stone above wore away, exposing the harder granite, and then wind, water, and cycles of freezing and thawing carved it into the tall, slender pinnacles that give the highway its name. Sylvan Lake, at the road's end, is younger and man-made, created in 1881 when a dam was built across a mountain stream, and it has drawn visitors and admiring photographers ever since.

• The Needles Highway is part of the Peter Norbeck National Scenic Byway, which was designated a National Scenic Byway by the United States Department of Transportation in 1996, named for the governor and senator who dreamed the road into being.
• Peter Norbeck scouted the entire route himself, marking the course on foot and on horseback, and chose a path through the granite that the engineers of his day said could not be built.
• The Needles Eye Tunnel is only about eight feet four inches wide, barely wider than a single car, which is exactly why RVs, buses, and large trucks cannot pass through it.
• Construction was completed in 1922, and the one-lane tunnels were cut by hand straight through some of the hardest granite in the Black Hills.
• The granite of the needles formed more than a billion years ago, cooling slowly deep underground before wind, water, and frost sculpted it into the tall, slender spires seen today.
• The spire called the Needle's Eye is named for the narrow opening near its top, worn through the solid rock over centuries by wind, rain, and cycles of freezing and thawing.
• Sylvan Lake, at the road's end, is not natural at all. It was created in 1881 when a dam was built across a mountain stream, and it is often called the crown jewel of Custer State Park.
• The trail to Black Elk Peak, the highest point in the United States east of the Rocky Mountains, begins at Sylvan Lake right along the Needles Highway.

Yes. The Needles Highway, State Route 87, is one leg of the Peter Norbeck National Scenic Byway, a loop of connected roads through the Black Hills named for the governor and senator who created them. The United States Department of Transportation designated the Peter Norbeck byway a National Scenic Byway in 1996, recognizing its outstanding scenic, natural, and historic qualities.

The Needles Highway runs about fourteen miles along State Route 87 through Custer State Park, between Sylvan Lake and the junction with U.S. Route 16A. It is a slow, winding mountain road, so even without stopping it takes the better part of an hour to drive. Most visitors give it longer to pause at the tunnels, the spires, and Sylvan Lake.

No, not through the tunnels. The one-lane tunnels along the highway are extremely narrow, and the famous Needles Eye Tunnel is only about eight feet four inches wide, too tight for RVs, buses, trailers, and large trucks to pass. Before setting out, check your vehicle's width and height against the posted tunnel limits. Large vehicles should plan an alternate route through the park rather than attempt the Needles.

The highlights include Sylvan Lake at the northern end, the one-lane Needles Eye Tunnel and the rock spire it is named for, the soaring Cathedral Spires, and the granite needles that give the road its name. Trailheads for Little Devils Tower and for Black Elk Peak, the highest point east of the Rockies, also open right off the road for those who want to hike.

The Needles Highway runs inside Custer State Park, so a Custer State Park entrance license is required to drive it, the same pass that covers the rest of the park. You can purchase the license at park entrance stations or visitor centers. The pass is good for the whole park, so it also covers the Wildlife Loop and the park's other scenic drives.

Late spring through early fall is the season to go, since the road is open then and the weather is mildest, with autumn bringing golden color to the surrounding forest. Early morning and late afternoon offer soft light on the granite and thinner crowds, which helps on such a narrow road. Summer is the busiest time, so an early start makes the drive more relaxed.

No. The Needles Highway closes for the winter, typically from around October or November until April, because of snow and ice on the steep, narrow mountain road. Exact opening and closing dates vary from year to year with the weather, so it is wise to check current conditions with Custer State Park before planning a visit in the colder months.

No. When the road is open, the Needles Highway is fully paved, and any passenger car can drive it. There is no need for four-wheel drive or high clearance. What the road asks for instead is patience and care, since it is narrow and winding, with sharp switchbacks and one-lane tunnels where cars must take turns.

The road is narrow and twisting, with tight switchbacks, pigtail curves, and one-lane tunnels, so the key is to drive slowly and stay alert for oncoming cars. Yield at the tunnels and let vehicles come through one at a time. Watch for hikers, climbers, and rock along the shoulders, and keep an eye out for the park's wildlife, including bison, elsewhere in Custer State Park. During the open season, brief mountain storms can bring rain, so give the pavement time to dry.

The needles are made of granite that formed deep underground more than a billion years ago, when molten rock cooled slowly beneath the surface. Over vast stretches of time the softer stone above wore away, exposing the harder granite. Then wind, water, and endless cycles of freezing and thawing carved the exposed rock into the tall, slender spires, or needles, that line the road today.