Explore the most popular trails in Hahamongna Watershed Park with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

mountain biking
5 days ago

Fastest ever climb to top - so far!. No sun - rained night before.

mountain biking
11 days ago

Solo ride - climbed entire way without stopping. Felt strong first half climb but got tired at end. Descent was great - I had two minor mistakes only because I was I. Too high a gear. I’ll cleared all of the hard sections. I recorded the descent. Saw a deer at the top right before descent.

hiking
rocky
15 days ago

The trail was very rocky past 3 miles in.

Great hike! El Prieto (to the right at the fork) has more shade than the other trail to the left. So many mountain bikers. Some have bells and some don’t. Keep an eye out! Additionally, we encountered several mountain bikers digging up the trail with shovels and moving boulders around. Major LNT no no. I was disappointed to see this. Saw a beautiful deer on the trail, though. That was awesome.

mountain biking
rocky
23 days ago

I ride Mountain bikes it’s a really nice trail lots of hikers on the way done just have your beer bell to keep them aware your coming down. Other than that has rock gardens, it’s fast and switchbacks. From the parking lot to brown mountain peak and then head down to el Prieto to the parking lot is about 14.5 miles.

mountain biking
25 days ago

With Kevin Lin

Take El Prieto up to enjoy the shade during the elevation climb, start early to avoid excess heat on the fern trail, and enjoy the benches and trees up at the top before heading down the lower brown mountain trail :)

Interesting trail, if you go counter clockwise it’s all trees and shade (after the boring street part), then on the way down is rocky and totally exposed desert. Got there at 8:30a on a Saturday and the lot was already full. There’s street parking though. And yes, lots and lots of mountain bikers, the majority of whom are cool and for the rest, PLEASE GET A BELL.

I just want to remind everyone that bikes must yield to hikers. Happy to get out of the way, but make noise, say how many to expect, and don’t run hikers over.

Trail ran clockwise. Super shady cool day in the clouds. AllTrails was a little off on the way up the Gabrielino Trail— mostly around the Arroyo. Not sure if it was just because there’s a good amount of water right now. Just follow the water (and make sure the trail isn’t just on the other side) and you’ll be fine in these areas. Wear a bell or bring a friend on the downhill side to avoid a collision with a biker. I wouldn’t really recommend hiking here since mountain bikers don’t get much territory in this city, and there’s plenty of other spots to hike. Really nice single track— made me miss my bike. If you do hike or run, keep your dog on leash or leave him at home. Will head out here again but might just do the El Prieto side to the top as an out and back due to the amount of water and overgrown areas on the ascent today.

hiking
bugs
rocky
3 months ago

mountain biking
4 months ago

You should bring a helmet when going down the single track it was the most rewarding thing after having pedaled up the mountain; it is very technical With sharp turns but definitely very fun if your an adrenaline junkie loves bikes and heights. Awesome trail loved it. Conquered.

Be mindful of mountain bikers. As a hiker you are definitely sharing the trail through the whole hike. It was difficult a few times to find space to move out of the way for bikers. If you’re a mountain biker, it looked a bit difficult or definitely a trail for an experienced biker (but I’m no expert). We witnessed a handful of minor bike accidents. Steep, hilly, and narrow parts of trail. Plenty of shade during much of the trail. We saw a few snakes on the way there and a rattle snake on way back. Just watch the trail and be mindful to let the snakes pass and you’re fine. Wild flowers are in full bloom throughout hike. The earlier you go the less crowded by hikers, but bikers go earlier. Enjoy! Moderate hike.

Great day for a bike ride. I went counter clockwise and I’m glad that I did. Not too strenuous of an ascent to the top. Made sure to turn around every mile or so to get a look at the city skyline. The descent was definitely challenging. I noticed at least one rider that passed me on the way up riding down the same way — he was skipping the descent. By the time I started descending, I realized why the trail is labeled “hard.” Lots of steep switchbacks. There’s a river at the bottom of the switchback section which you follow to head out of the canyon. The trail along the side of the river quickly fades away and I ended up trudging through the river while carrying/walking my bike for 1/2mi.+, which honestly kind of sucked. Then you reach the stream crossings which number somewhere around 5-6 separate crossings, which led to me carrying home a muddy bike instead of just a dusty one. I will probably skip out on the last section next time and just turn around at the top like that other biker did because I don’t like to hike-a-bike through water.

This is an awesome trail. It looks to be primarily for those that are mountain bikers but they are very courteous and respectful to those of us that are hikers. There were some nice areas of water, shade, and sun. A great way to spend time with friends, family, or just time alone.

hiking
bugs
rocky
5 months ago

Shaded trail leads you away from urban chaos.

Great trail. We ventured out and explored several trails. Hardly any people, mostly a few mountain bikers. Easy hike to try with kids and you can get some amazing views. Be cautious in the summer months, there are areas with little to no shade.

in correct directions to devils gate.

we had a good time on this hike but be careful with the bikers some of them don't pay attention to the hikers when they're coming down a lot of water and a lot of greenery but stay off of the trails going to the east on your way up because they go into residential areas you can make it a big loop if you go to Brown Mountain saddle and come back towards JPL it's about nine miles if you do that

mountain biking
6 months ago

I’ve ride on this trails a million times and I gotta say they’re really fun, only downside is there are too many hikers specially on the weekend, try to head up there early to avoid some of them, and keep shredding !

mountain biking
rocky
washed out
6 months ago

I just rode to the saddle / fork for Brown Mountain / El Prieto. Had the trail mostly to myself at 7:30am. By 8:45am on my way back down there were dozens of mountain bikers climbing. It took me 52 minutes to climb from the Altadena Drive dead end. This is a great technical 3.5-mile climb to the saddle. There are many trail choices from there. I chose to return down.

Amazing hi like my kids

So the first mile is paved. I chose to go clockwise just to be different. There were about 6 stream crossings and they were wide/deep enough to get my feet wet. The first 4.5 miles were really easy. I only passed a couple of runners on the way too the top (start 7am). The hike up was not very difficult. Going down was a bit annoying. Thou they were nice and I was able to get out of the way, LOTS of bikers. The bikers going up was no problem getting out of there way, but having them zooming towards me ... it takes 7 miles to go down about 1500 ft in elevation (not steep all). Lots of people the last mile back to the car. If I were to hike this trail again, I would go cc wise ... only because I think I would not run into so many bikers (NO bikers on my hike up going clockwise).

Way too many mountain bikers!!! Look out!

Great trail with lots of wildlife. Have spotted bobcat and coyote and high variety of birds. It’s dog friendly!

walking
8 months ago

Great suburban trail to take dogs or little kids. lots to see. Bring treats for horses if your into that sort of thing. can finish in an afternoon.

Mostly paved, by an unattractive road. Does have an open view that is pretty at sunset, but not great if you want a quick hike in the wilderness. Fine for a leisurely walk though.

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