5 miles
642 ft
-1,214 ft
Avg time
Trail Supporters, Builders & Maintainers of South Boundary - Section 2 Trail


  • Riding area
  • Difficulty rating
  • Trail type
  • Bike type
    AM, XC
  • Trail Usage
  • Direction
    Both Directions
  • Climb Difficulty
    Black Diamond
  • Physical rating
  • Alpine Trail
  • eBike Allowed
  • Global Ranking

This track goes the opposite way I biked, so keep that in mind when you read this.

Starting at near the summit of Sierra de Don Fernando, you descend on FR 164 for a bit before hopping on South Boundary.
Once you're on SB, pop your bike in the highest gear and crank away down this long slightly downhill traverse across the side of the hill.

The trail is pretty smooth, so you can go pretty fast.
There's almost 3 miles of this kind of trail before you hit a nice field.
Head up the hill to the left if you want a nice view north.

From here the trail changes a bit into some tighter and rooty sections.
Watch those sharp corners and roots!
As you get lower, things go from rooty, to rocky.
Take a slight right onto FR 437 to continue down the SB trail.
Right at the end there's a rollover on a tree. It looks like a drop, but there's some flat rocks on the back that make this pretty easy if you're going slow.

Not sure who would ride up this...it would be terrible.

Local Trail Association
More Stats for South Boundary - Section 2 mountain bike trail
  • Altitude change
    -571 ft
  • Altitude min
    9,271 ft
  • Altitude max
    9,958 ft
  • Altitude start
    9,910 ft
  • Altitude end
    9,339 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    2 miles
  • Distance down
    3 miles
  • Distance flat
    1,279 ft
  • Avg time
  • Avg reverse time
  • view trail stats
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Layers winter
Trail Style
  • ?
Trail Conditions
  • Unknown
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
Directions to south-boundary-section-2 trailhead (36.337220, -105.441430)
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South Boundary -... Trail Reports

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more »
90 |
Aug 29, 2016 @ 11:29am
Aug 29, 2016
South Boundary - Section 2
80 |
Aug 29, 2016 @ 11:29am
Aug 29, 2016
South Boundary - Section 2

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