This Pleasanton Valley loop climbs to a scenic bluff that offers panoramic views of the Bay Area. Starting on the Oak Tree Trail, the hike gains 1,000 feet of elevation (over 2.5 miles) on the way up to a trail network that wanders through century-old olive groves and sprawling grassland. In the summer, temperatures can easily push 100 degrees; shade is limited on this trail, so drinking water is the key to a safe, enjoyable hike. It’s not uncommon to see deer ducking in and out of the landscape. Mountain lions, though present, are rarely spotted here.
-Mapped by Dave Miller
- Distance: 8.4
Location: 37.6199226379394, -121.887725830078
Turn right @ T-junction onto Oak Tree Trail and begin climbing gently towards the ridgeline. (Trail marker 3)
Location: 37.6154403686523, -121.889137268066
Bear right on main trail @ 3-way junction.
Location: 37.6207885742188, -121.883392333984
Continue right on the main trail bearing northeast towards the road. In 200 feet, veer left onto a small worn footpath heading west up the hill towards Sycamore Grove Trail. Note: There are no trail markers here so keep your eyes peeled.
Location: 37.613697052002, -121.890830993652
Bear left @ Y-junction (Trail marker 10). Directly ahead is an old olive grove planted in the early 1900's. The groves are being restored by the park and private parties.
Location: 37.6237602233887, -121.900688171387
Continue straight @ 3-way intersection (Trail marker 15).
Location: 37.6129264831543, -121.889305114746
Turn left @ T-junction onto Oak Tree Trail and head back to Waypoint 4 where you'll turn right @ Y-intersection heading back to the trailhead.
Location: 37.6210479736328, -121.888557434082
Turn left @ T-intersection onto Sycamore Grove Trail. To the west is the ridgeline you will be traversing shortly.
Location: 37.6147689819336, -121.881996154785
Pass through gate and turn right @ Y-junction onto Oak Tree Trail.
Location: 37.6161689758301, -121.893608093262
Keep left @ Y-junction towards the Thermalito trail (Trail marker 12).
Location: 37.6245613098144, -121.900520324707
Turn right @ Y-junction back onto Ridgeline Trail (Trail marker 16). Continue southeast along the ridgeline, enjoying panoramic views of Pleasanton Valley to the east.
Location: 37.6187477111816, -121.894950866699
Left @ Y-junction onto worn footpath (Trail marker 14). Before continuing, grab your camera and spin around for a jaw-dropping view of Pleasanton Valley to the northeast.
Location: 37.6125869750977, -121.889373779297
Turn right @ 3-way and immediately bear right @ Y-junction onto the Ridgeline Trail. (Trail marker 5) Note: Several small rabbit trails sprout off to the right, so make sure to stay on the main trail.
Location: 37.6165657043457, -121.895439147949
Continue straight on Thermalito Trail @ 3-way intersection (Trail marker 13). Ahead, several small hills obscure your view.
Location: 37.6143264770508, -121.890663146973
Turn left @ Y-junction leaving main trail and hiking along footpath to Oak Tree Trail.
Location: 37.6219711303711, -121.887657165527
Location: 37.6135520935059, -121.890663146973
Location: 37.6223945617676, -121.898468017578
Location: 37.6205749511719, -121.89623260498
Location: 37.6181182861328, -121.89469909668
This grove of olive trees has been around for many years.