4.8
(4827)
10,984
riders
02:08
20.2km
510m
Mountain biking
The Vitamin B Trail Loop is a 12.6-mile mountain biking route in Buena Vista, Colorado, known for its highly technical terrain.
Last updated: February 26, 2026
Waypoints
Start point
Parking
Get Directions
10.3 km
Highlight (Segment) • MTB Park
Tip by
20.2 km
End point
Parking
Way Types & Surfaces
Way Types
10.6 km
9.68 km
Surfaces
20.2 km
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Elevation
Highest point (2,950 m)
Lowest point (2,470 m)
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Weather
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Today
Wednesday 8 July
28°C
12°C
48 %
Additional weather tips
Max wind speed: 15.0 km/h
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This route was planned by komoot.
The Vitamin B Trail Loop is renowned for its extreme technical difficulty, often rated as 'Very Difficult' or 'Double Black Diamond' by local riders. It features extensive 'slow jank,' awkward gaps, numerous ledge drops, challenging rock gardens, and steep, rocky sections that often require hike-a-bike, especially in the initial mile. Riders should expect punchy climbs, loose rock fields, and narrow, exposed skinny lines, making it unsuitable for beginners.
The terrain is characterized by gnarly technical riding. You'll encounter a mix of obstacles including ledge drops, rock gardens, rollers, and steep rock rollers. There are also punchy climbs, loose and technical rock fields, and narrow chutes. While predominantly technical, some sections offer fast and flowy singletrack, interspersed with steep descents and uphills. The final stretch to the parking lot is particularly rock-filled.
For the Vitamin B Trail Loop, shuttling to the trailhead or riding up CR375 are recommended access options, as the trail is best enjoyed downhill. This helps manage the extreme difficulty. Specific parking areas are typically found near the start of CR375 or designated trailheads within the Fourmile Travel Management Area.
The Vitamin B Trail Loop is located within the Fourmile Travel Management Area. While specific permits for riding this trail are generally not required, it's always advisable to check the latest regulations for the Fourmile Travel Management Area regarding any potential fees or specific use permits that might be in effect for the area as a whole.
Information regarding dog-friendliness for this specific trail is not explicitly stated. However, as a general rule for technical mountain biking trails, it's often not recommended to bring dogs due to the challenging terrain and potential hazards for both the animal and other riders. Always check local regulations for the Fourmile Travel Management Area regarding dogs on trails.
The best time of year to mountain bike this trail is typically during the late spring, summer, and early fall months. During these periods, the weather is generally more favorable, and the trail is free of snow. Always check local weather conditions and trail reports before heading out, as conditions can change rapidly, especially at higher elevations.
Riders on the Vitamin B Trail Loop can anticipate breathtaking vistas. The trail offers amazing views, often overlooking the majestic Collegiate Peaks. The path itself winds through rugged granite outcroppings, adding to the dramatic and scenic beauty of the surroundings.
Given its extreme difficulty and technical nature, the Vitamin B Trail Loop is best enjoyed downhill. Many experienced riders opt for shuttling to the trailhead or riding up CR375 to access the start, allowing them to focus on the challenging descents and technical features rather than exhausting themselves on the climbs.
Yes, the route for the Vitamin B Trail Loop also passes through significant sections of the official trails named Vitamin B, Fourmile Spur Road, Lenhardy Cutoff Road, and Fourmile Cutoff Road.
Yes, the trail is known for specific demanding features like 'Flight for Life,' which requires careful consideration and scouting of lines before attempting. It also offers sessionable features with different line choices, appealing to advanced riders looking to hone their skills. The trail itself, formerly known as 'Supernatural,' is a local favorite in the Arkansas River Valley.
Given the trail's technical and challenging nature, it's crucial to be well-prepared. Bring plenty of water, snacks, a first-aid kit, and essential bike repair tools (spare tube, pump, multi-tool). Due to the remote and difficult terrain, consider carrying a GPS device or a fully charged phone with offline maps. Appropriate protective gear, including a full-face helmet and pads, is highly recommended.
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