FATMAP by Strava

Rock Island Loops

Advanced tech trails through the boulder fields on Table Rock.

Mountain Biking Severe

4.9 km
175 m
175 m
0-1 hrs
Low Point
830 m
High Point
1 km
Rock Island Loops Map

Mesa Reserve is Boise’s best place for techy trail riding, with a purpose-built track among boulder fields on the side of Table Rock. The Rock Island trails even flip the typical etiquette, asking that all users yield to bikers on these trails only. They are riddled with natural and constructed rock features, plus a mix of banked turns and flowy track, all among elevated views over the city


With a handful of trails in the network, multiple variations are possible. The route mapped here climbs on Tram Trail and Rock Island East, then descends Rock Island West to Rock Garden and back to Tram. The initial uphill is a bit burly, but then you’ll get full-on technical downhill the rest of the way. Expect moderate to advanced maneuvers, some of which are unavoidable and others optional. There’s a huge variety of features packed into these concise loops, so you could lap it more than once and try new moves every time.

Source: https://www.ridgetorivers.org/trails/detailed-area-descriptions/table-rock-area/



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.

High Exposure

3 out of 4

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


1 out of 4

Close to help in case of emergency.

Best time to visit

between April and November


  • Flow
  • Technical
  • Singletrack
  • Drops
  • Jumps
  • Tabletops
  • Rock Rolls
  • Rock Slabs
  • Rock Gardens

Similar routes nearby

Guidebooks in this area