trail running




nature trips

dog friendly

wild flowers


I really enjoyed this trail! It's quite a climb though, so those less experienced should be a bit more careful. There's a few narrower spots as well. The views are beautiful! Great for dogs too. The reviewer who wrote about the aggressive cow was not kidding. There was a heard of cows who saw my small dog and started walking towards us rather aggressively. Everything turned out fine, but be weary if you're walking with dogs or running.

15 days ago

Family and I started at around 10 AM in early September - sunny/clear skies/ 70-85°F. Parked at the Staging Area and picked up a trail map from a case on the far side of the lavatories.
Bring a hat, sunscreen, 1L+ water/person, and shoes with good traction. Beware of flies and poison oak. No wildflowers in late summer but plenty of hawks, lizards, cows, and the occasional deer. Start early to avoid the heat.

We hiked the route clockwise, starting from the Staging Area and Bollinger Creek Loop Trail (we took the right fork through the trees although either is fine) and continued right onto Las Trampas Ridge Trail, then left onto Corduroy Hills. We took a right onto Madrone Trail, left onto Virgin Williams, then left onto Madrone again, continuing past the pond and Eugene O'Neill Historic Site on the second leg of Madrone - both were pretty fun milestones, would recommend.
Madrone continues onto Del Amigo, and from there there are many routes to slightly shorten or lengthen your route back to the trailhead. We followed the hiking path onto Sulphur Springs, then Trapline, Mahogany, and Chamise. We ended at the Chamise trailhead and walked the short distance back to the Staging Area.

The first half of the hike was an easy/moderate, with lots of shade in the woods, some slopes, and both rocky and dirt terrain. I'd say the best views are during this part of the hike. There are a couple short but steep stretches between Bollinger Creek and Eagle Peak to keep things interesting. Since we hiked the loop clockwise, Corduroy Hills was mostly downhill for us. It looked pretty strenuous in the other direction - a continuous incline with virtually no tree cover. Something to try on a cooler day.
This trail was virtually downhill until Del Amigo. From there, expect uphill and a switchbacks until Sulphur Springs. There is shade and tree cover here - by now the afternoon sun was in full force. Back to easy/moderate along Trapline-Mahogany; a nice cooldown back to the trailhead.

The trail was lightly trafficked - we saw a few hikers, dogs, and the occasional biker, but were alone for most of the route. Great variety of dirt and rocky terrain, up/downhill slopes, and forest/open landscapes. Lovely views of Mt. Diablo, Danville, and the surrounding areas. Would love to come back and try the loop counterclockwise or one of the variations. No extensive experience necessary, just water and stamina.

Great hike, some shade and lots of sun and exposed area, bring a hat and sunscreens, amazing views!

16 days ago

1 month ago

Another option to get to wonderful Corduroy Hill is to go the opposite direction. Start from the Bollinger trailhead, head up one of the Bollinger loop legs (the one on the left nearest the trees will be full of cows on a sunny day), and meet up with the Las Trampas Ridge Trail. A left will take you past Redwood Peak, a fine little scenic spur, and afterwards send you circling around hills in a remote park of the park with fantastic views of not only obscure slices of Las Trampas, but, inevitably, Mt. Diablo looming over it all. A right on the Madrone trail takes you down into a ravine in which there was still a significant trickle of water in the creekbed in late August! Very cool. The Corduroy Hills trail will appear on your right after you emerge from the forest, and the real climbing and clambering begins. It's a tough, steep route, but incredibly rewarding. Something like 7.2 miles in all, likely a slightly higher total elevation than the 2214 total of the other route.