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Gravel rides
United States
South Dakota

Pennington County

The best gravel rides in Pennington County

4.0

(2)

122

riders

12

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Gravel biking in Pennington County is characterized by diverse landscapes, primarily within the Black Hills National Forest. The region features an extensive network of gravel roads and trails winding through dense pine forests, alongside streams, and across varied terrain. Elevations range from 5,000 to 7,000 feet, offering a mix of smooth gravel and more challenging sections. These routes provide varied experiences for gravel bikers amidst the distinctive granite formations of the Black Hills.

Best gravel bike trails in Pennington County

  • The most popular gravel bike trail is George S. Mickelson Trail – Hill City loop from Hill City, a 28.8 miles (46.4 km) trail that takes 2 hours 49 minutes to complete. This route features sections of the well-known George S. Mickelson Trail.
  • Another top favourite among local gravel bikers is Hill City – Crazy Horse Memorial loop from Sylvan Lake, a difficult 32.7 miles (52.7 km) path. This loop explores the area around the picturesque Sylvan Lake and passes the Crazy Horse Memorial.
  • Local gravel bikers also love the Hill City loop from Hill City, a 25.7 miles (41.4 km) trail leading through the Black Hills landscape, often completed in about 2 hours 20 minutes.
  • Gravel biking in Pennington County is defined by dense pine forests, varied terrain, and extensive gravel roads, offering options for different ability levels.
  • The routes in Pennington County are highly rated by the komoot community with an average score of 4.0 stars from 2 reviews. More than 80 gravel bikers have used komoot to explore Pennington County's varied terrain.

Last updated: August 2, 2026

4.0

(1)

24

riders

#1.

Hill City loop from Hill City

41.4km

02:21

380m

380m

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

The George S. Mickelson Trail – Hill City loop offers a distinctive gravel biking experience through the Black Hills, immersing you in dense ponderosa pine forests and open prairie vistas. You'll ride on packed crushed limestone and gravel, navigating gentle grades that occasionally give way to more strenuous uphill sections, especially near Mystic. Keep an eye out for the impressive granite walls, historic rock tunnels, and the numerous converted railroad bridges that are a hallmark of this route.

To plan your visit, remember that a trail pass is required for all users aged 12 and older, which can be purchased daily at the Hill City trailhead. While amenities like parking, restrooms, and water are available, be prepared for limited cell phone coverage in some areas. A gravel bike or mountain bike is highly recommended for the varied terrain, and allow around 2 hours and 49 minutes to complete this 28.9-mile (46.4 km) loop with its 2062 feet (628 metres) of elevation gain.

This difficult gravel biking route is a significant rail-to-trail project, following an abandoned Burlington Northern railroad line, which explains its gentle slopes and unique historical features. It's a great way to experience the tranquility of the Black Hills, with opportunities to spot wildlife and enjoy views of the Crazy Horse Memorial, making it one of the more popular routes for those seeking a challenging ride.

Hard

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Tips from the Community

Lauren & Bailey 🐕🐾
July 24, 2025, Sylvan Lake

A truly beautiful lake to walk around. The trail is easy, though there's a bit of a climb and a narrow cliff.

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A nice centre with all kinds of beautiful painted buffalos.

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The Black Hills are fossil-rich and from a distance the darker and denser vegetated ridgelines make them appear dark or even black.

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Major Lake Park is a quiet lakeside spot in Hill City, perfect for a picnic, a wildlife break, or a quick detour off the Mickelson Trail. Look out for geese, deer, and the local osprey.

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Along this section of the George S. Mickelson Trail, you'll cross several wooden bridges over Rapid Creek, offering incredible views as you're elevated above the water, surrounded by lush forest.

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The Crazy Horse Memorial is one of the most iconic landmarks in the Black Hills. Still under construction, it’s set to be the world’s largest mountain carving and honors the Lakota leader Crazy Horse. Even in its unfinished state, it’s an impressive sight and carries a powerful story about Native history and resistance. You can see the sculpture from the road, but the visitor center offers a closer view, along with exhibits on Native American culture and the carving process.

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As you head further south towards Custer, it feels like you're far from civilization. Buckthorn Mountain comes into view, surrounded by wide stretches of open greenery.

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On this stretch of the George S. Mickelson Trail, you’ll get clear views of Harney Peak, the highest point in South Dakota, surrounded by the rugged beauty of the Black Hills.

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Frequently Asked Questions

How many gravel bike trails are available in Pennington County?

Pennington County offers a good selection of gravel biking routes, with 9 trails currently available on komoot. These routes vary in difficulty and length, providing options for different skill levels.

What kind of terrain can I expect on gravel bike trails in Pennington County?

Gravel biking in Pennington County primarily takes you through the diverse landscapes of the Black Hills National Forest and Custer State Park. You'll encounter an extensive network of gravel roads and trails winding through dense pine forests, alongside streams, and across varied terrain. Elevations range from 5,000 to 7,000 feet, offering a mix of smooth gravel sections and more challenging rocky or rutted paths with climbs and descents.

What is the best time of year for gravel biking in Pennington County?

The Black Hills region generally offers excellent gravel biking conditions from late spring through early fall. Summers are popular, but spring and autumn provide cooler temperatures and beautiful scenery, with fewer crowds. Always check local weather conditions before heading out, especially for potential snow in higher elevations during shoulder seasons.

Are there any beginner-friendly gravel bike trails in Pennington County?

While many routes offer varied terrain, the George S. Mickelson Trail is known for its relatively smooth crushed limestone and gravel surface with a maximum grade of 4%, making it accessible for various fitness levels. For a moderate option, consider the Hill City loop from Hill City, which is 25.7 miles long and takes you through the Black Hills landscape.

Can I find challenging gravel routes in Pennington County?

Yes, Pennington County offers several challenging gravel routes. For instance, the Bridge – Waterfall by Rochford Road loop from Roubaix Lake is a difficult 63.6-mile (102.3 km) route with significant elevation changes. Another demanding option is the Sylvan Lake – Sylvan Lake loop from Custer, which explores the area around the picturesque Sylvan Lake within Custer State Park.

Are there any loop trails for gravel biking in Pennington County?

Yes, many of the gravel routes in Pennington County are designed as loops. Popular options include the Hill City loop from Hill City, a 25.7-mile trail, and the Sylvan Lake – Sylvan Lake loop from Custer, which is a more difficult 31.9-mile path.

What natural attractions or landmarks can I see while gravel biking in Pennington County?

Pennington County is rich in natural beauty and iconic landmarks. While biking, you might pass by areas near Black Elk Peak, the highest point in South Dakota, or the picturesque Sylvan Lake. The region is also home to the famous Mount Rushmore, which is easily accessible from many routes. The Black Hills National Forest itself offers stunning vistas and dense pine forests.

Is it possible to see wildlife on the gravel bike trails?

Absolutely! The Black Hills National Forest and Custer State Park are teeming with wildlife. Cyclists often spot bison, deer, elk, and bighorn sheep, which roam freely, especially within Custer State Park. Keep an eye out, particularly during dawn and dusk, for unique viewing opportunities.

Are there any dog-friendly gravel bike trails in Pennington County?

Many trails within the Black Hills National Forest are dog-friendly, provided your dog is on a leash. The George S. Mickelson Trail, for example, allows leashed dogs. Always check specific trail regulations before you go, especially within Custer State Park, as rules can vary.

What do other gravel bikers enjoy the most about gravel biking in Pennington County?

The gravel biking routes in Pennington County are highly rated by the komoot community, with an average score of 4.5 stars. Reviewers often praise the diverse landscapes, from dense pine forests to open prairies, and the extensive network of gravel roads that offer both tranquil rides and challenging climbs. The opportunity to explore iconic areas like the George S. Mickelson Trail and Custer State Park is also a highlight for many.

Are there any routes that pass by lakes in Pennington County?

Yes, several routes offer views of or pass near beautiful lakes. The Sylvan Lake – Sylvan Lake loop from Custer directly explores the area around the stunning Sylvan Lake. Other routes may take you near Sheridan Lake or Horse Thief Lake, offering picturesque spots for a break.

Where can I find parking for gravel bike trails in Pennington County?

Parking is generally available at trailheads and access points for popular routes like the George S. Mickelson Trail, particularly in towns such as Hill City and Custer. Within the Black Hills National Forest and Custer State Park, designated parking areas are common. It's always a good idea to check specific route details or local visitor information for the most convenient parking options.

Can I combine gravel biking with exploring nearby national parks?

Absolutely. Pennington County is an excellent base for exploring nearby national parks. While not directly within the county, Badlands National Park and Wind Cave National Park are a relatively short drive away. You can enjoy a morning gravel ride and then spend the afternoon exploring the unique geological formations of the Badlands or the intricate cave systems of Wind Cave.

Most popular routes in Pennington County

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Check out more Gravel rides throughout Pennington County below and find the perfect route in your destination.

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