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Bald Knob Trail

Purisima Creek Redwoods Open Space Preserve

March 26th, 2024

6.1 miles
1150 vertical feet
Total Time: 3:16

Starting elevation
1700 feet
Max elevation
1957 feet

Rating: 6/10

Directions: Take Highway 92 west toward Half Moon Bay. At the top, turn left onto Skyline Boulevard (Highway 35). After about 7 miles, turn right onto Tunitas Creek Road. Follow the winding road for about 2 miles to the the trailhead. Don't park in front of the gate.   View Driving Map



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GPX File

This is a trail that had been on my list for a few years, probably since doing the Borden Hatch Mill Trail back in 2015. That trail took us close to the Grabtown Gulch trailhead and the other trails to the west. However, I knew that there was precious little parking at Grabtown Gulch - I'd heard maybe space for 3 cars. So I was hesitant to make an attempt. However, since we were going on a Tuesday, I figured parking wouldn't be a problem.

In truth, there's probably space for maybe 6 cars by the side of the road - probably 3 just past the trailhead, and another 3 just before the trailhead (where we parked). Maybe even more. It's tight, but not that tight. When we arrived, there was one other car parked near us; its driver was looking way up in the sky, taking pictures of the impressive trees right next to the road. There were another 2 cars parked just past the trailhead, but we never saw anyone on the trail this entire hike.

I'd biked up Tunitas Creek Road several times, so I kind of knew what to expect. It's one of the prettiest roads I've biked on, and driving it is just as nice (as long as you're careful of course). While it wasn't supposed to rain today, it was foggy when we arrived, and the forest had a magical sort of feel.

Grabtown Gulch Trail

We started off on the wide trail, which was covered with wet leaves and muddy in places. There were also banana slugs. Lots of them. I stopped counting after about 15 in the first 10 minutes. After about 0.4 miles we turned left onto the Borden Hatch Mill Trail. After another 0.2 miles we turned left onto the narrow Bald Knob Trail. Soon we were in a forest with ferns on either side of the trail. The Bald Knob Trail is a fairly gentle climb through the forest.

Banana slug

Grabtown Gulch Trail

Grabtown Gulch Trail

Borden Hatch Mill Trail

After turning a corner we could see that the skies were starting to clear a bit, but the fog hadn't completely lifted. There was one downed tree blocking the trail that we had to climb over. And then soon after that we reached the Irish Ridge trail, about 1.9 miles from the trailhead. There's a spur trail to the right which leads to the top of Bald Knob, but I didn't think the views would be great because of the fog. Plus, I knew we'd get some views on the Irish Ridge Trail, anyway. So we went left instead.

Ferns along Bald Knob Trail

Misty forest next to the Bald Knob Trail

Black and white version

Bald Knob Trail

Black and white version

Moss on the Bald Knob Trail

Moss on the Bald Knob Trail

The Irish Ridge Trail descends, steeply at times, on a somewhat grassy trail. Soon enough we did get views of the Pacific Ocean and hills to the right. The views don't last long, though, and after that the descent is somewhat uneventful (other than dodging all the banana slugs). After descending about a mile we reached the Lobitos Creek Trail. We turned right and almost immediately saw our destination: the "Elbow tree" (as indicated on the park map). It's a huge redwood tree with what looks like another tree hanging off the side of it like someone holding up a hand making a turn signal.

Elbow tree

Elbow tree

We stopped near the tree to have lunch. The Lobitos Creek Trail actually continues past the tree for about 0.7 miles, though lots of downed branches lay on the trail here. But after lunch we just turned around and headed back up the Irish Ridge Trail. While the skies were clearer, I didn't give much thought to taking the spur trail up to Bald Knob. Instead we just turned right onto the Bald Knob Trail, over the downed tree, and then continued all the way back to the trailhead.

View from the Irish Ridge Trail

Moss covered trees at the Bald Knob/Irish Ridge intersection

While it may not sound like a very exciting hike, I would definitely recommend coming here when it's foggy. The redwood forest has a sort of magical appeal when it's enshrouded in fog and mist. I wouldn't come here for the views, although there are some. Come for the forest. And try not to step on any banana slugs.


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