The Grand Loop - mountain bike cycling event - in Nucla, CO - presented by UltraMB

The Grand Loop

May 29 - June 5, 2026366 Main St, Nucla, CO
Event Details

Event Type

Mountain Bike

Location

366 Main StNucla, ColoradoOpen in Maps

Links

Upcoming Dates

May 29 - June 5, 2026Register

Event Location

About This Event
The Grand Loop - one of the oldest bikepacking routes out there and arguably the original bikepacking race route, linking some of the earliest established long-distance mountain bike routes in the country. The Grand Loop is almost entirely dirt, but there’s very little singletrack or gravel along the way. That being said, the riding is still quite technical on 4x4 tracks and abandoned uranium mining roads, and few of the miles come easily. The Grand Loop’s 360 miles of rough riding straddles the stunningly unforgiving country of the Utah-Colorado borderlands. Making an enormous circuit around and over the massive Uncompahgre Plateau and the La Sal Mountains, the route traverses lowlands and canyons along the Colorado River that bake in the summer heat. And the high coniferous forests and meadows hold snow until late spring. The ideal riding season is short, nestled in the weeks between late spring snowmelt up high and furnace-like summer temperatures down low. The landscape and remoteness along the way are as striking as they are daunting.
Additional Information

Conquer the Rugged Wilds: Your Guide to The Grand Loop

The Original Bikepacking Odyssey

The Grand Loop stands as a titan in the world of endurance cycling, recognized as one of the oldest and most storied bikepacking routes in existence. This isn't your average gravel grind - it is a raw, unforgiving journey through the heart of the Utah-Colorado borderlands. Born from the earliest days of long-distance mountain biking, the route weaves together historic paths to create a 360-mile circuit that tests the grit of every rider who dares to line up. From the high-altitude silence of the Uncompahgre Plateau to the red rock canyons that flank the Colorado River, this event is a masterclass in remote mountain biking and backcountry navigation.

What to Expect on the Loop

  • Extreme Remoteness - You will traverse vast stretches of wilderness where self-sufficiency is the only rule of the trail and help is far away.
  • Technical Terrain - Expect rugged 4x4 tracks and abandoned uranium mining roads that demand constant focus and high-level bike handling skills.
  • Drastic Climate Shifts - Riders must navigate the "sweet spot" of the season, balancing high-alpine snowmelt with the intense heat of the lowland canyons.
  • Primitive Roads - While the route is almost entirely dirt, the miles are earned on doubletrack and mining paths that are often more taxing than traditional singletrack.
  • Unmatched Scenery - From the soaring peaks of the La Sal Mountains to the deep desert basins, the visual rewards are as massive as the physical effort.

The Course: 360 Miles of Raw Backcountry

The Grand Loop is a massive 360-mile circuit that straddles the rugged border between Colorado and Utah. Starting and ending in the Nucla area, the route launches riders into a diverse landscape that is as beautiful as it is daunting. The elevation profile is a constant challenge, climbing from the baking river canyons up into the lush, high-coniferous forests of the Uncompahgre Plateau and the La Sal Mountains.

The riding surface is almost entirely dirt, but the technical nature of the 4x4 tracks means few miles come easily. The route utilizes historic uranium mining roads that provide a unique, rocky texture to the ride. Because the course reaches significant alpine heights, lingering snow can be a factor well into the spring, while the lower sections near the Colorado River can reach furnace-like temperatures. This is a course that requires expert navigation, mechanical self-reliance, and a deep respect for the natural elements of the high desert and mountain environments.

Event Highlights and Trail Vibe

  • Historic Routes - Ride the same paths that pioneered the sport of bikepacking, linking legendary trails into one epic, continuous loop.
  • The La Sal Ascent - Experience the grueling but breathtaking climb into the La Sal Mountains, offering panoramic views of the surrounding red rock desert.
  • Uranium Road History - Traverse the unique, abandoned mining roads that give this region its distinct character and technical mountain bike challenge.
  • Pure Adventure Vibe - This event is about the connection between the rider and the wild. The atmosphere is one of grit and mutual respect among athletes facing an immense challenge.
  • Uncompahgre Plateau - Navigate the massive high-altitude plateau, a section known for its stunning meadows, dense forest canopy, and solitude.
  • Self-Supported Spirit - True to its roots, the event emphasizes the spirit of traditional bikepacking, where preparation and resilience are just as important as fitness.

Bike & Gear Tips for The Grand Loop


Frequently Asked Questions

What kind of terrain and trail conditions should I expect?

Prepare for 360 miles of punishing dirt, primarily consisting of technical 4x4 tracks and abandoned uranium mining roads. While there is very little singletrack, the route is incredibly demanding with rough surfaces that make every mile a challenge through the Utah-Colorado borderlands.

Is The Grand Loop suitable for beginner mountain bikers?

This is an expert-level bikepacking challenge designed for riders with high-endurance capabilities and technical bike-handling skills. The combination of extreme remoteness, significant elevation changes, and technical trail features requires self-sufficiency and experience in rugged backcountry environments.

What bike and gear are recommended for this route?

A capable mountain bike with high-volume, durable tires is essential to navigate the rocky 4x4 tracks and mining roads. Your setup must include reliable bikepacking bags for self-supported travel, as you will be traversing isolated areas between the Uncompahgre Plateau and the La Sal Mountains.

How does the elevation profile affect the riding experience?

The route features massive vertical shifts, climbing from sun-baked canyons along the Colorado River to high coniferous forests and alpine meadows. Riders must be prepared for drastic temperature swings, ranging from furnace-like heat in the lowlands to potential lingering snow at higher elevations.

What are the logistics for water and resupply in this remote area?

This is a remote, self-supported endeavor through unforgiving country where resources are scarce. You should carefully plan your water capacity and resupply strategy based on the latest route information, as the landscape between Nucla and the surrounding plateaus offers very few amenities.

Can spectators follow the action along the route?

Due to the extreme remoteness and technical nature of the 4x4 roads, traditional spectating is very limited. Most fans follow the progress of the riders through digital tracking platforms - check the event website for the latest details on how to monitor the race in real-time.

Reviews

Reviews

Share your photos, offer tips and course insights, or inspire others to join the fun!

The first 5 cyclists to review within 72 hours after this event receive a free Starbucks or Dunkin gift card ($10 value).

Sign in to write a review

Sign In