FATMAP by Strava

Black Rock: Bonzai Downhill

Bonzai Downhill loop.

Mountain Biking Difficult

8.7 km
439 m
439 m
1-2 hrs
Low Point
209 m
High Point
600 m
Black Rock: Bonzai Downhill Map

The Bonzai Downhill Trail (BD for short) "can best be described as the 'bread and butter' experience at Blackrock,” according to BRMBA.org. "It is the most versatile trail on the mountain, allowing each rider to challenge him or herself according to their skill set, so everyone, from first-time to the most-experienced riders, will don a smile as they ride BD,” they continue.


On BD, you’ll find massive dirt and wood berms and all manner of wood features. But in order to allow each rider to craft their own downhill experience, all of the features provide ride-around options.

Riders rave about the quality of the trails at Black Rock! "Freeride mountain bikers will think they’ve died and gone to heaven when they roll up to the Black Rock mountain bike trails,” writes EVO.com. "This system of trails has a seemingly endless selection of drops, jump, and wooden features. These are the features most riders only dream about, too, from wallrides, to skinnies, drops, hips Black Rock has it all,” they continue.

While Bonzai is labeled as one of the easiest trails at Black Rock, depending on which line you choose, you can either have a beginner, intermediate, or advanced mountain biking experience.

Sources: https://www.evo.com/travel-guides/bike/oregon/eugene-corvallis/black-rock https://brmba.org/trails/banzai-downhill/



Mostly stable trail tread with some variability featuring larger and more unavoidable obstacles that may include, but not be limited to: bigger stones, roots, steps, and narrow curves. Compared to lower intermediate, technical difficulty is more advanced and grades of slopes are steeper. Ideal for upper intermediate riders.

High Exposure

3 out of 4

Some trail sections have exposed ledges or steep ascents/descents where falling could cause serious injury.


2 out of 4

Away from help but easily accessed.

Best time to visit

between May and October


  • Flow
  • Technical
  • Singletrack
  • Drops
  • Jumps
  • Wooden Feature

Guidebooks in this area