Looking for a great trail in San Gabriel Mountains National Monument, California? AllTrails has 13 great hiking trails, trail running trails, mountain biking trails and more, with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers, and nature lovers like you. Ready for some activity? There are 7 moderate trails in San Gabriel Mountains National Monument ranging from 3.9 to 13.7 miles and from 672 to 5,324 feet above sea level. Start checking them out and you'll be out on the trail in no time!

hiking

views

wildlife

nature trips

dogs on leash

wild flowers

trail running

forest

bird watching

mountain biking

camping

walking

backpacking

dog friendly

river

kid friendly

waterfall

hiking
off trail
private property
rocky
scramble
5 days ago

amazing time....couple areas the trail was not as visible. went w a group. none of us had been. we camped right past the bridge....it was spectacular

Great trail. Moderate skill level is correct. Rocky trail, with some narrow transitions. Awesome rock formation views. Careful on hike day picked. We went on a really hot day in July and felt it! Beginners here and felt the burn afterwards. Enjoyed it though!

great trail, great POI(Bridge Nowhere), in one way, at least 6 times to cross river, needed, each time you must dip your feet in the water. then walk through rocky and sandy trail 5 mile on one way. on the way to bridge, you must take right upper ridge trail to about 1 mile range to the bridge, on the way back you must take this same slope to get down to river trail. both way 4.5 hours moving time and extra 1.5 hour, toal 6 hours hike for enjoyable for everybody. absolutely, one of the most enjoyable trails in the area. At least 2 of Lt of water recommended to carry in summer time hike, like over 80 degree, anybody, over 8 years old can try this fun hike.

Fairly easy trail to hike and navigate, but way too many bugs (in August, can’t speak for other times of the year). I think the Angeles Forest has better hikes to offer, but this one offers a good workout and occasionally stunning views.

hiking
no shade
over grown
rocky
scramble
7 days ago

Very challenging but would do again. First time going there and was tricky continuing on the right trail but would occasionally follow blue and red markers left by others along the trail. Definitely got really dehydrated because of very strong sun so I would recommend taking as much water as you can. Water was very beautiful, unlike any I’ve seen in other rivers near by. It actually looked clear and blue! It was cold but feels great after hiking in burning sun. Hike would have been 5 stars if the correct trail was more obvious for 1st timers because it made the hike initially a bit anxiety inducing. The parking is difficult but we still managed to find some in the “no parking” zones because that’s all there was and dozens of other cars were parked there as well with no tickets so I think they just don’t enforce it anymore. I could be wrong though and they might do random sweeps but seems unlikely. The area prior to the real action of the trail is very overcrowded with campers and swimmers but soon after its nearly desolate up until the bridge where there are bungee jumpers.

This road was once the torture and killing location for SERIAL KILLERS Lawrence Bittaker and Roy Norris aka The Toolbox killers. They brought 4 out of 5 of their victims here ages 13-17 where they raped tortured and murdered them with tools from there tool chest. Some of the torture were from dusk till dawn. They threw their bodies over the canyon. Definitely a creepy vibe here

Make certain you either bring lots of water or a water filter! It gets hot on the way up and very little shade. Also be sure to head up the ridge to the trail above the river in the east side when you come to the section where the road/ trail is eroded. We missed it and ended up having to hike an extra mile once we realized our error. Beautiful water holes at the bridge, we spent an hour there to cool off before heading back down.

hiking
off trail
8 days ago

*Attention Paw Parents* Make sure your furry friend has booties on and take plenty of breaks in the shade. Luckily the river is near by. The sand/rocks become unbearable throughout the day. Several people had to carry their dogs back. You will have to help your dog crossing the river, the current was strong and I my dog weighs 24kg. Bring plenty of water and electrolyte drinks. For a moment you do lose the trail, but just follow the river.

Fun Adventure, bring plenty of water can easily lead up to 6, 8 hour hike watch for snakes. lots of shade around also bring extra socks may have to cross the river a few times. Done this hike 3x times still love it.

hiking
bugs
no shade
off trail
rocky
washed out
11 days ago

Today I began my midweek hike to the Upper Monroe Truck Trail using the Poop Out access and the Mystic Canyon exit. As I followed the trial up the views of the various peaks of the San Gabriels thrilled my senses and encouraged me to continue with each step. And on my return, the trail revealed expansive views of the valley below. Quite an invigorating hike!

My midweek hike to the Upper Monroe Truck Trail began using the Poop Out to access the trail and Mystic Canyon to exit it. As I followed the trial north views of stunning peaks of the San Gabriel Mountains encouraged me along the way and on my return, I enjoyed expansive views of the distant valley below. Quite an experience!

hiking
bugs
no shade
rocky
13 days ago

hiking
scramble
14 days ago

This trail was beautiful! I started at 6 and the sun didn't reach over the mountains till I reached the turn around point then it was too hot for me to hike. Make sure to pay special attention to the trail leading to the bridge once you are almost there.

hiking
no shade
15 days ago

hiking
bugs
over grown
rocky
scramble
16 days ago

The All Trails description and reviews of this trail do not adequately describe or warn against the scrambles. They are much more difficult and it is very easy to lose the trail. I have done dozens of trails marked as “HARD” in All Trails and there is a major discrepancy between a difficult trail...and whatever this is. As a result, I was not properly prepared. I know that preparation is just as much on me, but that is why I am writing this review - to hopefully spare someone what I went through. If it’s hot, bring twice as much water as you normally would for the mileage. If you feel like you are off trail or the scrambling becomes scary, STOP...turn around, go back, and look for the last time you were certain you were on trail. In summer, bring a headnet for the flies. Wear pants and long sleeves, as the trail is overgrown with thorny bushes and yucca plants that are determined to stab you. Don’t follow my recording. At all. It will get you lost. Good luck. I’ll take the long way up next time.

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