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 Jul 15, 2018
Very Dry
Avg: 4 (3 votes)

view (254)
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

Jul 15, 2018 @ 6:32pm
Jul 15, 2018
East Boundary trail received a much needed brushwork day, today, 7/15/18. We cleared brush and grasses from the trail from its intersection with...
Apr 14, 2018 @ 10:02am
Apr 14, 2018
Mar 26, 2018 @ 12:09pm
Mar 26, 2018
East Boundary is good from Horse Camp to Baranca, but will be too wet after. Please allow a week for the trail to dry out.
Mar 25, 2018 @ 1:57pm
Mar 25, 2018
From Hazard Canyon Road to Barranca, this trail is fine. But last the intersection with Barrance there is extended sections of sticky mud. Don't...
Mar 4, 2018 @ 8:39pm
Mar 4, 2018
Hero Dirt. Mud limited to 2-3 small puddles which can be avoided easily. The waterbar section of the DH has also been reworked, and is running...
view all reports »


more »
74 |
Mar 24, 2017 @ 7:25pm
Mar 24, 2017
East Boundary Trail, Los Osos
43 |
Mar 24, 2017 @ 7:25pm
Mar 24, 2017
East Boundary Trail, Los Osos
40 |
Mar 24, 2017 @ 7:24pm
Mar 24, 2017
East Boundary Trail, Los Osos
48 |
Mar 24, 2017 @ 7:24pm
Mar 24, 2017
East Boundary Trail, Los Osos

Routes with this trail

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