7 routes · Mountain Biking

Onza Alley
Vail
An old school tech trail that offers a good challenge for upper intermediate and advanced riders.
Mountain Biking Severe
- Distance
- 1.1 km
- Ascent
- 0 m
- Descent
- 133 m
- Duration
- 0-1 hrs
- Low Point
- 2.6 km
- High Point
- 2.7 km
- Gradient
- 7˚

Description
Unlike PMT, Onza Alley is solidly in the single back diamond range—as long as you don't drop into the uber-gnarly drop on Bailey's Bailout!
Onza Alley falls between two blue trails on the mountain, allowing a faster and slightly more challenging way down when compared to nearby Lion Down. For upper intermediates looking to push the boundary, Onza Alley could be just the ticket.
Vail Mountain describes Onza Alley as "a difficult singletrack with narrow, steep sections over roots and rocks." Forget the flow trail—Onza keeps it old school!
Source: https://www.vail.com/explore-the-resort/activities-and-events/summer-activities/mountain-biking.aspx
Difficulty
Severe
Widely variable, narrow trail tread with steeper grades and unavoidable obstacles of 15in/38cm tall or less. Obstacles may include unavoidable bridges 24in/61cm wide or less, large rocks, gravel, difficult root sections, and more. Ideal for advanced-level riders.
Best time to visit
Features
- Technical
- Singletrack
- In the forest
- Drops
- Roots
- Rock Gardens