3 miles
634 ft
-831 ft
Avg time
Trail Supporters, Builders & Maintainers of East Boundary Trail

East Boundary Trail Details

East Boundary begins with a moderate climb through thick vegetation. The microclimate changes soon to sandy chaparral, and about half way up this climb (mile 0.4), turn left at the Hazard Peak Trail junction to stay on East Boundary. The Barranca junction at mile 0.9 just below the top of this first climb - again, go straight (left) to remain on East Boundary. After this, a short drop leads to a steeper climb that brings the trail into an open grassy hillside. Several short ups and downs finish at a maintenance tool station - this is the top of the main descent (mile 2.0).

The trail now becomes more rocky and drops steeply and steadily back into chaparral over many large water bars. There is one somewhat sudden right hand corner (mile 2.3), so be alert and keep your speed in check. A long, gradually curving traverse ends at Islay Creek Road.

East Boundary can ridden in the reverse direction, in which case the 1.6 mile climb from Islay Creek Road is relentlessly steep and well-rewarded with great views and an undulating descent to Barranca, Hazard Peak Trail, or Manzanita


DO NOT RIDE EAST BOUNDARY TRAIL past the Barranca intersection during or for many days after rain due to very expansive clay soils. This will destroy the trails tread and the goo does not wash off easily. In case of rain, ride Barranca instead.

Local Trail Association
More Stats for East Boundary Trail mountain bike trail
  • Altitude change
    -198 ft
  • Altitude min
    382 ft
  • Altitude max
    1,002 ft
  • Altitude start
    579 ft
  • Altitude end
    382 ft
  • Grade max
  • Grade min
  • Distance climb
    1 miles
  • Distance down
    1 miles
  • Distance flat
    1,404 ft
  • Avg time
  • Avg reverse time
  • view trail stats
on Nov 4, 2017
Avg: 4 (3 votes)

view (139)
Layers winter
Trail Style
  • ?
Trail Conditions
  • Unknown
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
Directions to east-boundary-trail-28351 trailhead (35.291650, -120.843420)
update trails status or condition

East Boundary Trail Trail Reports

Nov 4, 2017 @ 9:44pm
Nov 4, 2017
Dry but not too overgrown, better than it was 6 months ago!
Jun 19, 2017 @ 9:01am
Jun 19, 2017
reporter CCCMB Brushing Crews started brush clearance of trail north of the bridge and started back toward Islay Creek Rd but they did not reach the...
May 6, 2017 @ 7:48am
May 6, 2017
May 6, 2017 @ 7:47am
May 6, 2017
May 6, 2017 @ 7:47am
May 6, 2017
Still very overgrown, trail hard to follow at times, needs trail work
view all reports »


more »
41 |
Mar 24, 2017 @ 7:25pm
Mar 24, 2017
East Boundary Trail, Los Osos
37 |
Mar 24, 2017 @ 7:25pm
Mar 24, 2017
East Boundary Trail, Los Osos
35 |
Mar 24, 2017 @ 7:24pm
Mar 24, 2017
East Boundary Trail, Los Osos
42 |
Mar 24, 2017 @ 7:24pm
Mar 24, 2017
East Boundary Trail, Los Osos

Routes with this trail

more »
Figure 8 Route
10 miles
Hazard Peak from Horse Camp
6 miles
MDO Enduro Route
28 miles
10 miles

Trail Events


1 Review & Comments

  • + 0
flag Jamp87 (May 6, 2017 at 7:42)
 Very over grown. Last parts of East Boundry has low visibility right now, some rutted areas

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