East Boundary Trail is a 11.2 mile moderately trafficked out and back trail located near Los Osos, California that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is best used from February until November.

Distance: 11.2 miles Elevation Gain: 2,273 feet Route Type: Out & Back


nature trips


bird watching



wild flowers


no dogs

1 month ago

East Boundary is still muddy.

over grown
2 months ago

parts of this trail are pretty overgrown. most of the trail is in pretty good shape and well used, but there is not a lot of clear signage for this particular trail. The views and weather were nice, but there wasn't a whole lot that was interesting about the landscape, as there was not a lot of variation, rock formations, or differing vegetation. There is a lot of animal life: deer, coyote, rabbit, bird, etc. For me personally, I prefer more mountainous and forested scenery, but the coastal views were nice. There were a ton of mountain bikers and poison oak as well. Overall just so so.

4 months ago

Did a short loop out horse camp road to East Boundary trail. Then took cutoff to Hazard Peak trail and then down Manzanita back to Horse Camp road. Walked through horsecamp to cable trail and looped back up to parking turnout on Pecho. Nice fairly easy loop if you don't have time for the longer loop to Hazard Peak.

Sun Aug 20 2017

I believe this was my first hike when I moved back to SLO COUNTY and was living in Los Osos. Not for the faint of heart and definitely bring lots of water. It goes way back so best to hike with a partner and bring a phone just in case. Moderate inclines and great views once you get up in the mountains.

Tue Aug 02 2016

Bring a trekking pole to swat away spider webs if you go early in the morning! BEAUTIFUL trail. Favorite I've done in the area so far. We met up with East Boundary via the Hazard Peak trail & then headed down Islay Road back out to Pecho Road. 9 mile loop, highly recommend!

mountain biking
Mon Jan 20 2014

Go out here a lot it is a Great place to ride mountain bikes via connector trails, see many people hiking out there as well but mostly mountain bikers of all skill levels. Lots of elevation and rocky descents are out there as well. Good place to take a lunch as far out as you can go to relax in solitude.