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Routes
Mountain biking trails
United States
Colorado
Gunnison County

Big Loop

Hard

2.7

(23)

79

riders

Big Loop

04:18

28.2km

470m

Mountain biking

Prepare for a difficult mountain biking adventure on the Big Loop, a route that winds through the diverse terrain of the Hartman Rocks Recreation Area. You will cover 17.5 miles (28.2 km) and climb 1549 feet (472 metres), an effort that typically takes around 4 hours and 17 minutes. As…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Hartman Rocks

BLM - Gunnison Field Office

Waypoints

A

Start point

Get Directions

1

27.9 km

Collarbone Alley

Highlight • MTB Park

Collarbone Alley is a fun way to finish your mountain bike loop. Lots of berms and tiny jumps that will put a smile on your face, for sure.

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B

28.2 km

End point

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Way Types & Surfaces

Way Types

22.6 km

5.55 km

121 m

< 100 m

Surfaces

17.7 km

6.14 km

3.25 km

1.20 km

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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 (2,550 m)

Lowest point (2,350 m)

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Weather

Powered by Foreca

Today

Thursday 25 June

22°C

9°C

63 %

Additional weather tips

Max wind speed: 22.0 km/h

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Frequently Asked Questions

How long does it take to mountain bike the Big Loop?

This challenging mountain bike route typically takes around 4 hours and 18 minutes to complete. The total distance is approximately 28.2 kilometers (17.5 miles).

Is the Big Loop trail suitable for beginners?

No, the Big Loop is rated as a difficult mountain biking trail. It features technical sections and significant elevation changes, making it best suited for experienced riders.

Where can I park to access the Big Loop mountain bike trail?

The Big Loop trail is located within the Hartman Rocks Recreation Area. You can typically find parking at various trailheads throughout the recreation area, which provide access to the extensive trail network. Check the Hartman Rocks Recreation Area website for specific trailhead parking locations.

Are there any permits or entrance fees for Hartman Rocks Recreation Area?

Generally, there are no entrance fees or permits required for day use at Hartman Rocks Recreation Area. However, it's always a good idea to check the official Bureau of Land Management (BLM) website for any current regulations or special event requirements before your visit.

Is the Big Loop trail dog-friendly?

Yes, dogs are generally allowed on trails within Hartman Rocks Recreation Area, including the Big Loop. Please ensure your dog is kept on a leash at all times and that you clean up after them to preserve the natural environment for everyone.

What is the best time of year to mountain bike this route?

The best time to mountain bike the Big Loop is typically during the spring and fall months when temperatures are milder. Summer can be very hot, and winter conditions may bring snow and ice, making the trail impassable or significantly more challenging.

What kind of terrain can I expect on the Big Loop?

The Big Loop offers a diverse and challenging terrain typical of Hartman Rocks. Expect a mix of technical singletrack, rocky sections, and potentially some exposed sandstone. There are significant climbs and descents throughout the route.

What can I see along the Big Loop route?

The Big Loop showcases the rugged beauty of Hartman Rocks. You'll experience varied landscapes and can enjoy views of the surrounding high desert. One notable section you'll encounter is Collarbone Alley, known for its technical features.

Does the Big Loop intersect with other trails in Hartman Rocks?

Yes, the Big Loop is part of the extensive Hartman Rocks trail system and intersects with many other paths. Along this route, you'll pass through sections of trails such as Outback, Sawtooth, Bambi's, Josies, Rocky Ridge, Dave Moe's, Sky Line, Dirty Sock, and Enchanted Forest, among others.

What should I bring for a mountain bike ride on the Big Loop?

Given the trail's difficulty and length, it's essential to be well-prepared. Bring plenty of water, snacks, a repair kit for your bike, a first-aid kit, sun protection, and appropriate mountain biking gear. A GPS device or a downloaded map is also highly recommended as the trail network is extensive.

Are there any specific challenges or insider tips for riding the Big Loop?

The Big Loop is known for its technical sections and sustained climbs. Riders often find that starting early in the day helps avoid the heat, especially in summer. Be prepared for rocky terrain and ensure your bike is in excellent condition. While there are many intersecting trails, staying on the marked Big Loop route requires attention to navigation.

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