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Pleasanton Ridge North

Pleasanton Ridge Regional Park

February 19th, 2022

9.5 miles
1880 vertical feet
Total Time: 4:13

Starting elevation
514 feet
Max elevation
1514 feet

Rating: 7/10

Directions: From the north, take Interstate 680 south. Take exit 26 to Bernal Ave in Pleasanton. The exit ramp makes a U-turn. Turn left onto Bernal Ave. (toward the hills). In 0.3 miles, turn right onto Foothill. After 0.4 miles, turn left onto Old Foothill Road, then right into the Castleridge trailhead parking lot. There is also street parking along Old Foothill Road, but it is 1-way in the opposite direction you are coming from. Alternative: take Interstate 580 to exit 44A to Foothill Road going south, then turn right onto Old Foothill Road.   View Driving Map



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GPX File

It was an unseasonably warm and dry winter day (as had been the case for several weeks), and we took advantage by hiking in the northern section of Pleasanton Ridge. There's a larger parking area to the south, where I had hiked 5 years ago. This newer Castleridge Trailhead opened up in 2018, and provides easier access to the northern portion of the park.

The street parking was full, but there was plenty of parking in the lot. We walked through some of the adjacent Alviso Adobe Community Park, which is an interpretive park with an adobe structure that dates back to 1854.

There's a restroom at the trailhead. After walking up the trail for a minute we reached a map display with dozens of paper maps available (they were all gone by the time we returned on our way back).

The first part of the trail is a steady uphill climb for nearly 2 miles along the Courdet Trail. The trail is a wide dirt fire road with some shade. As we climbed we obtained views of Mount Diablo, but a haze marred the view.

Looking back toward the parking area (to the left)

Hazy view

At the top, we crossed over Ridgeline Trail and briefly climbed to the highest spot (just off the main trail), where a few others were enjoying the views. You can see the Diablo Range to the east, and rolling green hills and the Sunol Ridge to the west. The only blemishes to the view are a series of antenna towers, and the fact that you can view someone's private residence near the top.

Rolling hills to the west from the top

After enjoying the views, we headed back south along the Ridgeline Trail. This is an easy, mostly flat trail along the Main Ridge. We spotted a few raptors along the way, but not close enough to get any good pictures. After about 0.7 miles we reached a pond at the intersection with the Sinbad Creek Trail, where we turned right.

Another view from Main Ridge

Pond at the intersection of Ridgeline and Sindbad Creek Trails

The Sinbad Creek Trail descends, very steeply at times, for about 0.85 miles until a T-intersection at the bottom. We turned right to stay on the Sinbad Creek Trail, which is now mostly level. It follows the creek through Kilkare Canyon, though you can't see the creek itself most of the time.

Tree along the Sinbad Creek Trail

Lichen-covered tree

We could have cut the hike a bit shorter by turning right onto the Shady Creek Trail, but we decided to keep going a little further. We turned right onto the Turtle Pond/Loop Trail, then shortly reached the pond. We didn't see any turtles, but did see some ducks on the pond surface.

Sinbad Creek

Turtle Pond

The climb up the Loop Trail is not too steep; definitely nowhere near as steep as the descent on the Sinbad Creek Trail. At the top, we stopped for a brief snack before turning right onto the Ridgeline Trail. We were careful to stay on the main trail, avoiding the many unsigned use trails. We saw some poppies on the hillsides, but in general didn't see any great wildflower displays. Soon enough we climbed back up to where we'd started the loop section of the hike earlier (near the top of the 2 mile climb at the start of the hike). We turned left onto the main trail and then quickly turned right to start our descent of the Courdet Trail.

It's a steep descent back to the parking area, and it seemed longer than I thought it would be. At first I thought I saw the restrooms at the start of the trail, but instead they were some other private buildings further up. Eventually we made it back to the trailhead and the end of the hike. I would probably avoid this hike from late Spring to early Fall, as a lot of it is unshaded and it gets hot in the summer and the grasses turn brown. But at other times of the year it's a nice hike.


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