4.0
(2)
122
riders
12
rides
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.
Last updated: August 2, 2026
4.0
(1)
24
riders
41.4km
02:21
380m
380m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
13
riders
38.6km
02:15
410m
410m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.0
(1)
18
riders
53.9km
03:12
690m
680m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
riders
127km
07:51
1,640m
1,640m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4
riders
46.4km
02:49
630m
630m
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.
5
riders
41.1km
02:19
360m
360m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
riders
172km
10:43
2,170m
2,170m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Pennington County
Gravel biking in Black Hills National Forest
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Gravel biking around Hill City
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Hiking in Pennington County
Cycling in Pennington County
MTB Trails in Pennington County
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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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.


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