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Routes
Mountain biking trails
United States
Colorado
Boulder County

Hall Ranch Loop

Hard

3.4

(18)

21

riders

Hall Ranch Loop

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 minutes. As you pedal, you'll traverse rolling grasslands and navigate past dramatic sandstone buttes, with the landscape shifting from red dirt to green trees. Keep an eye out for wildflowers and local wildlife along the way. From the high point, especially around the Nelson Loop, you'll get expansive 360-degree views, including the majestic Arapahoe Range and Longs Peak.

When planning your visit to Hall Ranch, be aware that it's a very popular spot, so you should anticipate crowds, particularly on weekends. The trailhead offers parking, but spaces tend to fill up quickly during peak hours, so arriving early is a good idea. It's important to note that dogs and e-bikes are not permitted on these trails. This regulation is in place to protect local wildlife and ensure a safe environment for all users.

This area is known for its vibrant natural environment, where the transition from rolling grasslands to rugged sandstone formations creates a unique ecosystem. The varied landscape supports a range of flora and fauna, making it a prime location for wildlife viewing. The trail's popularity stems from its accessibility and the quality of the mountain biking experience it offers, drawing riders looking for a substantial challenge in a scenic setting.

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

A

Start point

Parking

Get Directions

1

62 m

Hall Ranch Trailhead

Highlight • Parking

Hall Ranch has something for everyone: no matter if you are an expert, intermediate or beginner. At the Hall Ranch Trailhead you will find lots of parking spots, compost toilets, and picnic tables. By the way there is a lower parking lot and an upper parking lot. If you don't like to start your mountain bike ride with a technical climb you better choose the Antelope Trailhead.

Tip by

2

9.44 km

Nelson Loop

Highlight (Segment) • MTB Park

This loop at the top of Hall Ranch is excellent for beginners and intermediate riders. The climbing is mostly easy and the descent is fun and fast. The loop can be ridden in either direction.

Tip by

3

15.4 km

Lower Bitterbrush Trail

Highlight (Segment) • Trail

This trail starts at the main Hall Ranch parking lot und leads all the way up to the junction with the Antelope trail. You can expect a great technical climb with many rock features and grippy sandstone ledges. And in case you are wondering: Yes, the trail can also be ridden in the other direction.

Tip by

B

18.6 km

End point

Parking

Loading

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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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (2,030 m)

Lowest point (1,630 m)

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Weather

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Wednesday 6 May

4°C

-2°C

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This route was planned by komoot.

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Frequently Asked Questions

Is the Hall Ranch Loop suitable for beginners?

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.

What is the terrain like on the trail?

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.

Where can I park for the Hall Ranch Loop?

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.

Are dogs allowed on the Hall Ranch Loop?

No, dogs are not permitted on the trails within Hall Ranch Open Space. This regulation is in place primarily due to wildlife concerns.

Are there any permits or entrance fees for Hall Ranch Open Space?

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.

What is the best time of year to ride the Hall Ranch Loop?

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.

What kind of scenery and viewpoints can I expect along the route?

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.

Are there any notable landmarks or points of interest on the trail?

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.

Is there a recommended direction to ride the Nelson Loop section?

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.

How can riders of different skill levels best experience the Hall Ranch Loop?

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.

What wildlife might I encounter on the trail?

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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