Explore the most popular trails near Los Vaqueros Reservoir & Watershed with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.





nature trips

wild flowers

no dogs

trail running

Los Vaqueros Reservoir & Watershed, California Map

great hike in spring with all the wild flowers, unless you have allergies! Beautiful views of the livermore valley year around.

mountain biking
1 month ago


Drove all the way up here to find that mountain bikes are only a allowed on a small area from the north access point to the reservoir. One star for misinformation.
I did drive up to the walnut staging area from the north and rode the trails, but would only give this 2 stars for mountain biking. Go somewhere else.

Great hill by the dam. best done as a fall or winter hike.... It gets plenty hot in the summer. Near where Los Vaqueros trail intersects 10 years ago there were several nested pairs of Golden Eagles. Not sure if they're still around but it was awesome watching them fly around when I fished that corner of the lake.

3 months ago

Fantastic views!

nice valley and lake views.

4 months ago

The first part of the trail is all uphill so stay to the right when the trail forks, otherwise you can go down by the reservoir and hike back along the beach to the parking lot (like we did).

It was a Beautiful Sunday morning hike.. Windy but beautiful... right off the incline was a butt kicker

9 months ago

This is a fantastic trail in which you walk through open grasslands and oak woods and you are always surrounded by the forest covered hills. You can also access the park's group camping area on this trail as well as the out and back Fox Tail Trail. The majority of the elevation is right at the start and then (because it is a loop) right at the end. Plenty of Brush Rabbits and other wildlife to spot. Also some turn of the century farming equipment here and there since this was once a working ranch/farm.

This is a very beautiful trail that is well marked and easy to follow. I hiked it in the spring, so there are many uneven areas along the black hills trail section due to cattle tracks. The views are amazing and well worth the 1000ft ascent. Bring water, a hat, and lots of sunscreen as the trail is completely exposed to the sun as it passes through grasslands. There are lots of cows here, but they are docile and avoid you as you approach. However, they may follow you for a short while after you pass. No problems!
There is a park use fee for the area of $6, cash or credit card.

Beautiful trail and fairly easy walk :)

10 months ago

4/22/2017 Hike
We started hiking as a family and this is only our second hike. I was afraid that this might be too difficult for novice hikers like us. It turned out easier than I thought, the uphill trek was slow going but doable. I don't recommend to people with bad knees or backs. Once you get over the hill, the views are amazing! There are some areas closed off due to erosion and at this time of the year, some parts are overgrown, but still doable. Definitely worth going to this one.

parking fee

cows stopped my hike 2 miles in.

Monday, February 13, 2017

The lower trail was muddy and overgrown due to the recent rains, small areas just completely torn-up. The wind was almost unbearable to me for the first hour, but I kept going. Great uphill workout though, and a nice view of both Sierra (in far distance) and Diablo. Park entrance is $6.00.

Saturday, January 28, 2017

Quite a hidden gem with some great views if you go while the hills are green. The trail starts and ends with substantial elevation changes. This not a casual stroll. Parts of the trail were overgrown with vegetation. There are lots of cows, horses, hawks and I saw a few coyotes on the trail. Also some good views of Mt. Diablo.

Friday, December 23, 2016

This trail is actually in the park named Round Valley Regional Preserve. However, Round Valley is next door to Los Vaqueros Reservoir, which is spelled incorrectly as well.

Round Valley Regional Preserve address is 19450 Marsh Creek Rd, Brentwood, CA

Thursday, November 03, 2016

Liked this one because I've fished everywhere along the water it goes. There's always some waterfowl on the lake plus the Golden Eagles and a few other raptors. Awesome to watch the eagles swoop down and capture the trout. There is also a very healthy population of coyotes in the area. It's not uncommon to see them when you are away from the people.

I hiked the area a lot with a few different people but never saw another person here in the winter or fall. Definitely the time to do it. I was hardly ever here in the summer.

Thursday, November 03, 2016

I use to fish and hike out here quite a bit a couple of years after they opened it. The trails are uneventful but a pretty good hiking and fishing place in the fall and winter months.

20 days ago

mountain biking
25 days ago

1 month ago

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