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Routes
Mountain biking trails
United States
Colorado
Gunnison County

The Hartman Rocks Big loop

Hard

2.9

(14)

54

riders

The Hartman Rocks Big loop

05:37

36.1km

700m

Mountain biking

Get ready for a difficult mountain biking adventure on The Hartman Rocks Big loop, spanning 22.4 miles (36.1 km) with a significant 2289 feet (698 metres) of elevation gain. This route takes you through diverse high-desert terrain, featuring extensive singletrack and slickrock sections. You will navigate rolling hills dotted with sagebrush and encounter striking granite rock formations, including technical features like rock rollers and drops. Expect to spend around 5 hours and 36 minutes on this challenging ride, with expansive vistas from viewpoints like the Top of the World Trail. You can see the Gunnison Basin to the north and the majestic San Juan Mountains, West Elks, and Sawatch Range to the south.

Planning your visit is straightforward, as the Hartman Rocks Recreation Area is easily accessible from Gunnison. You will find ample parking available at various trailheads. Because of its high desert ecosystem, the trails here tend to dry out earlier than those at higher elevations, making it an excellent choice for spring and extended fall riding. Remember that these are multi-use trails, so you will be sharing them with dirt bikers, hikers, and trail runners.

This comprehensive loop offers a truly rewarding experience for skilled riders looking to explore the unique high desert ecosystem of the Hartman Rocks Recreation Area. The striking granite rock formations and diverse trail surfaces, from singletrack to slickrock, make it a standout destination. It is a place where you can push your limits while enjoying the rugged beauty of the landscape and the far-reaching views from its highest points.

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

Parking

Get Directions

1

464 m

Jack‘s Trail

Highlight (Segment) • Trail

Jack's is the first trail you hit when you start your ride at Hartman Rocks Trailhead. Easy climbing except for some steeper sections near the top.

Tip by

2

3.53 km

Top of the World Trail

Highlight (Segment) • Trail

Great trail that can be ridden in both directions, but is definitely more fun from west to east.

Tip by

3

31.8 km

Rattlesnake Trail

Highlight (Segment) • MTB Park

Be prepared for some gnar! Rattlesnake is a very technical singletrack with big rock rolls, drops, and other features.

Tip by

B

36.1 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

27.4 km

7.80 km

562 m

283 m

Surfaces

23.0 km

6.88 km

3.94 km

1.71 km

562 m

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Elevation

Elevation

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

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Weather

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Today

Monday 18 May

13°C

3°C

75 %

Additional weather tips

Max wind speed: 32.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

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

The Hartman Rocks Big loop is an excellent choice for spring and extended fall riding. Its high desert ecosystem means the trails dry out earlier than higher-elevation routes, making it accessible when other trails might still be wet or snowy.

What is the terrain like on this mountain bike route?

The terrain is highly varied, featuring a significant amount of singletrack, slickrock, and natural surface roads. You'll encounter rolling hills covered in sagebrush, striking granite rock formations, and technical features like rock rollers, drops, spines, and slabs. Some sections are fast and swooping, while others involve tricky uphill moves and loose rock.

How difficult is The Hartman Rocks Big loop?

This loop is generally considered an intermediate to hard mountain bike ride, requiring good fitness and advanced riding skills. It includes sections with steep climbs and challenging technical moves, including black diamond rated parts. Some climbs, particularly on slickrock, can be formidable and may even require pushing your bike.

Are dogs allowed on the trails in Hartman Rocks Recreation Area?

Yes, the Hartman Rocks Recreation Area is generally dog-friendly. As a multi-use area managed by the BLM, dogs are typically allowed but should be kept under control, preferably on a leash, to ensure safety for all users and wildlife.

What kind of views can I expect along the route?

The high desert setting offers beautiful vistas. You'll enjoy views of the Gunnison Basin to the north and the majestic San Juan Mountains, West Elks, and Sawatch Range to the south. The unique granite rock formations and scenic drainages also contribute significantly to the visual appeal.

Where can I park to access the trailhead for this loop?

The Hartman Rocks Recreation Area has multiple access points and parking areas. Given its proximity to Gunnison, you can find parking at designated trailheads within the area. Specific parking details for the 'Big Loop' can vary depending on your chosen starting point within the extensive trail system.

Do I need a permit or pay an entrance fee for Hartman Rocks Recreation Area?

No, there are generally no permits or entrance fees required to access the Hartman Rocks Recreation Area for day use. It is managed by the Bureau of Land Management (BLM) and is open to the public.

What are some notable trails or highlights along this route?

The Big Loop incorporates many trails within the Hartman Rocks system. Some notable sections you'll encounter include Jack‘s Trail, Top of the World Trail, and Rattlesnake Trail. The route is designed to give you a comprehensive tour of the area's diverse features.

Does this loop intersect with other trails?

Yes, as a comprehensive tour of the Hartman Rocks system, this loop intersects and utilizes many trails. You'll ride sections of trails like Josies, Gateway, Joshos, Outback, Dave Moe's, and Top of the World, among many others within the extensive network.

Are there any specific challenges or strategies for riding this loop?

The 'Big Loop' combines many trails, including black diamond sections with steep slickrock climbs and technical features. A good strategy is to be prepared for varied conditions and technical riding. Some riders find that tackling certain climbs early in the ride can conserve energy. Always assess your skill level, as some sections may require dismounting and pushing your bike.

What should I bring for a mountain bike ride on this loop?

Given the length and difficulty, bring plenty of water, snacks, and essential bike repair tools. Sun protection (sunscreen, hat, sunglasses) is crucial due to the exposed high desert environment. A helmet, gloves, and appropriate riding gear are also highly recommended for safety.

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