3.4
(18)
21
riders
01:47
18.6km
440m
Mountain biking
Embark on the Hall Ranch Loop for a challenging mountain biking experience near Lyons, Colorado. This difficult 11.6-mile (18.6 km) route takes you through diverse terrain, offering a rewarding ride with 1439 feet (439 metres) of elevation gain. You can expect to complete it in about 1 hour and 46…
Last updated: April 23, 2026
Tips
Includes a very steep uphill segment
You may need to push your bike.
After 6.45 km for 294 m
Waypoints
Start point
Parking
62 m
Highlight • Parking
Tip by
9.44 km
Highlight (Segment) • MTB Park
Tip by
15.4 km
Highlight (Segment) • Trail
Tip by
18.6 km
End point
Parking
Way Types & Surfaces
Way Types
13.4 km
3.24 km
989 m
402 m
336 m
211 m
< 100 m
Surfaces
13.9 km
4.17 km
540 m
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Sign up for freeElevation
Highest point (2,030 m)
Lowest point (1,630 m)
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Today
Wednesday 14 October
9°C
4°C
86 %
Additional weather tips
Max wind speed: 5.0 km/h
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This route was planned by komoot.
The Hall Ranch Loop offers a diverse experience. While the overall difficulty is rated as difficult, sections like the Nelson Loop and the Antelope Trail can be more approachable for intermediate riders. The Lower Bitterbrush Trail, however, is known for its ultra-difficult, rock-garden-laden technical sections, making it challenging even for experts. Beginners might find many parts of the loop too demanding.
The terrain varies significantly. You'll encounter everything from smooth, flowing singletrack on parts of the Nelson Loop to highly technical rock gardens on the Lower Bitterbrush Trail. Expect mixed granite and dirt tread, switchbacks, steep climbs, and fast, flowing descents with occasional rocky sections. The landscape transitions from rolling grasslands to sandstone buttes.
Parking is available at the Hall Ranch Trailhead. Due to the trail's popularity, especially on weekends, the parking lot can fill up quickly. Arriving early is highly recommended to secure a spot.
No, dogs are not permitted on the trails within Hall Ranch Open Space. This regulation is in place primarily due to wildlife concerns.
As of current information, there are no specific permits or entrance fees required to access Hall Ranch Open Space for day use. However, it's always a good idea to check the Boulder County Parks & Open Space website (bouldercounty.gov) for the most up-to-date regulations before your visit.
The trail is generally accessible for much of the year, but spring and fall offer ideal conditions with pleasant temperatures and vibrant scenery. Summer can be hot, and afternoon thunderstorms are common. Winter riding is possible but depends on snow accumulation and trail conditions.
You'll be treated to spectacular scenery, including rolling grasslands, dramatic sandstone buttes, and excellent viewing opportunities for wildflowers. From the Nelson Loop, you'll get beautiful 360-degree vistas, including views of the Arapahoe Range and Longs Peak. The red dirt and green trees create a vivid landscape, and you'll see dramatic tilted rock formations where the Great Plains meet the Southern Rocky Mountains.
Yes, the Nelson Loop passes by the remnants of the historic Nelson Ranch, including an old homestead and grain silo, offering a glimpse into the area's past. The Lower Bitterbrush Trail itself is a notable feature, famous for its challenging technical sections.
While the Nelson Loop can be ridden in either direction, riding it clockwise is often recommended. This direction provides better flow on the downhill sections, enhancing the overall riding experience.
Intermediate riders looking for a less technical climb can start on the Antelope Trail. For those seeking a significant challenge, the Lower Bitterbrush Trail offers ultra-difficult, rock-garden-laden sections that will test expert mountain bikers. The Upper Bitterbrush Trail provides gentler grades for climbing and a fast, flowing descent.
Hall Ranch is home to various wildlife. While enjoying the natural beauty, riders should be aware of potential encounters with animals, including rattlesnakes. Always stay alert and give wildlife plenty of space.
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