Oak Oasis Open Space Preserve

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View of San Vicente Reservoir, San Diego, CA from the Oak Oasis Open Space Preserve
San Vicente Reservoir from the Oak Oasis Preserve
Oak trees in the Oak Oasis Open Space Preserve, Lakeside, CA
Oak woodland, Oak Oasis Open Space Preserve

Oak Oasis Open Space Preserve

      • Location: Lakeside, east of San Diego. From the north end of the freeway portion of Highway 67, take a right on Mapleview, go 0.3 miles and turn left on Ashwood St. Follow Ashwood for a total of 4.3 miles (it becomes Wildcat Canyon Road) and turn left into the signed Oak Oasis County Park lot. The road to the park is narrow so observe the 10 miles per hour speed limit. From Ramona, take San Vicente Road southeast to Barona Road. Turn right and follow Barona Road, which becomes Wildcat Canyon Road, 9 miles to the park. The park will be on the right side of the road.
      • Agency: San Diego County Parks & Recreation
      • Distance: 2.7 miles
      • Elevation gain: 300 feet
      • Suggested time: 1.5 hours
      • Difficulty Rating: PG
      • Best season:  Year round (8am-4:30pm daily)
      • USGS topo map: San Vicente Reservoir
      • Recommended guidebook: Afoot and Afield: San Diego County
      • More information: Yelp page here; trip descriptions here and here
      • Rating: 6

Located just beyond the San Diego suburban fringe, Oak Oasis (known too as Oakoasis) County Park is an attractive 230-acre parcel of open space that offers panoramic views of the San Vicente Reservoir and Iron Mountain, plus interesting geology, meadows, glimpses into the history of the land and yes, oaks.

Trail head, Oak Oasis Open Space Preserve
0:00 – Trail head (click thumbnails to see the full sized version)

The 2003 Cedar Fire was perhaps the most dramatic episode in the area’s history, claiming the old Minshall House. Fortunately the park is showing signs of recovery from the fire. The park is an enjoyable place for simply wandering without a specific route or destination; it’s a stop on the San Diego Trans-County Trail, which comes up from the west and continues east toward El Capitan. There are several possible routes to take and the 2.7-mile loop described here offers a nice sampling of the area’s scenery.

Trail junction, Oak Oasis Open Space Preserve, Lakeside, CA
0:07 – Junction with the county trail (times are approximate)

From the trail head at the north side of the parking lot, descend past the information board to the trans-country trail. Turn left and follow it through chaparral to a Y-junction. Bear left and follow the trans-country trail as it climbs briefly to a ridge, providing some nice views, before dipping back into the oak-shaded canyon.

Oak woodland, Oak Oasis Open Space Preserve, Lakeside, CA
0:20 – Rejoining the Oak Oasis Loop

Here, bear left and follow the canyon, staying straight at another turnoff. A plaque describes the unfortunate history of the Minshall House, which once stood at that location. Shortly after the plaque, a spur leads to an overlook between two trees.

You leave the woodland and come back into the open, with the San Vicente Reservoir spread out ahead. Bear right as the country trail heads left and begin a moderate climb, rejoining the trail from below. A short spur leads to another overlook where you get an even better view of the reservoir and Iron Mountain dominating to the north.

Informational plaque, Minshall House site, Oak Oasis Open Space Preserve, Lakeside, CA
0:23 – Sign at the former Minshall House site

More climbing past some jumbled granite boulders brings you to a small, oak-lined meadow and the half-way point of the loop. The trail then descends into a chaparral-lined canyon, passes through a field and some private houses and re-enters the oak woodland. Bear left at the next junction and make a brief climb to rejoin the trans-country trail, completing the loop. From here, retrace your steps back to the parking lot.

Meadow in the Oak Oasis Open Space Preserve, Lakesisde, CA
0:43 – Meadow; half way point

Text and photography copyright 2014 by David W. Lockeretz, all rights reserved. Information and opinions provided are kept current to the best of the author’s ability. All readers hike at their own risk, and should be aware of the possible dangers of hiking, walking and other outdoor activities.  By reading this, you agree not to hold the author or publisher of the content on this web site responsible for any injuries or inconveniences that may result from hiking on this trail.  Check the informational links provided for up to date trail condition information.

Oak woodlands, Oak Oasis Open Space Preserve, Lakeside, CA
1:00 – Back into the woodlands


  1. I love this hike! It’s such a nice, quiet little spot. It’s one of our favorite places to hike with our dog, since its not too long and has easy terrain for him 🙂

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