Explore mammoth lake - view hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

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Maybe I was having an "off" hike. I found this trail to be very difficult to follow. I got to a point of the trail where the only option to go would have been to scale a very sandy and steep hill, I would've taken that route had I not been with my 60 lb dog. If that was the true route to go, I would not call this trail a dog-safe trail. Unfortunately we had to turn around.

hiking
9 hours ago

Short, but steep hike to a very pleasant lake. I would rate this as hard due to the steep grade. The lake itself is wonderful - a lot of people were swimming in the lake during my visit.

hiking
13 hours ago

Beautiful hike! Easy+/Moderate. Views are stunning both ways. Hit a thunder and lightening storm, rain and sleet at Duck Lake. Saw horses and dogs on the trail, everyone friendly. Several lakes along the way to have a snack or cool your feet. Many places along the route to filter water. Mosquitos not too bad.

So beautiful. I got to go back! Got here too late.

Amazing Views of Lake Mary, Lake George and at the end the lovely Lake Crystal.
This is a moderate hike with some great elevations, so if you are a beginner then consider this a hard hike ( not for distance , but only because of elevation and lots of curves )

This is without a doubt one of the most beautiful hikes in the eastern Sierras where you are treated with spectacular views at every turn. The alpine lakes and mountain views are breathtaking. The trail can be difficult and hard to find at times due to the fact that you are often walking over shale rock. I would not rate this trail as moderate for the average hiker but it is so well worth it!

backpacking
4 days ago

hiking
5 days ago

Very nice stream running next to the trail. I was rather disappointed with the condition of the lake. It has been stagnant for quite some time and it not ideal for swimming.

Great views and very relaxing once at the lake

hiking
5 days ago

Beautiful hike. Moderate but challenging because of the altitude. A little smokey at the beginning because of the fires, but cleared up before we got to Crystal Lake. Cool, clear water with a few people jumping off rocks into it. Saw a few people with fishing poles too and they all said they weren't having any luck. Seemed to take about an hour and 15 minutes to get up there. This was with many stops and a really slow pace.

hiking
7 days ago

Great hike beautiful lake!

One of the best day trail hikes in eastern Sierra

The elevation gain happens fast. And the lake is at 9800 feet, so prepare to be winded.

Beautiful hike! The trail is nice in that it has some switch backs that are spread throughout some meandering paths. Lots of water with at least one waterfall and stunning views of Sabrina.

Definitely need to stay hydrated - even though much of the hike is in the trees it is draining. Blue Lake is over 10,000 feet, so be careful if you are not ready for the altitude.

hiking
12 days ago

For starters you have to drive all the way through Coldwater Campground for parking. Restrooms are available. make sure to go early because parking does fill up quickly. Beautiful short hike with small side trails to walk along the creek. Hike is about .75 miles both ways (1.5 miles). Dog Friendly as well.

Very nice hike! This is our 2nd time and it was just as pretty as the first. There is a lot of smoke in the area due to the Lions fire but there was none on this hike, which was a real plus. The first mile is some work and the switchbacks leading to the top of the pass are challenging but doable. Go on this one, you won’t be disappointed!

hiking
13 days ago

Great hike, very beautiful.

One of my favorite hikes of all time! The name "twenty lakes basin" definitely does it justice as there's at least one lake in sight for most of the hike. I personally did more of a figure 8, going around both sides of saddlebag lake, which I'd recommend to make it even more interesting. If you are used to hiking and living at a high altitude, I would still classify this as easy, but maybe moderate if you're used to sea level. My coworker called it "probably the flattest longer hike in the Eastern Sierra". There was still a bit of snow on the trail as of mid July which made it a little tricky to follow but never too bad. As a bonus, it's just outside of Yosemite, so you get the beauty without the crowds or the entrance fee. Loved it!

Beautiful!!

backpacking
15 days ago

Has anybody done Bishop Pass or Treasure Lakes recently? I'm worried about the air quality. Does anybody know how it is up there?

hiking
15 days ago

Simply spectacular. We used the trail on the far side of Saddlebag lake from what's shown on the map and I think it's got more interesting terrain and flora and is less exposed. Recommend walking the lake loop clockwise from the top of Saddlebag–the second half of the trail has some sections that were still covered in snow in mid July that were much easier to navigate from that direction than the reverse, as well as some climbs up scree that I would not have enjoyed going the opposite way. This trail wouldn't be particularly challenging at lower elevation, but as it's between 10 and 11,000, you may feel any climbs and be a bit worked over by the end if you're not acclimated.

An epic hike! Completed this with two great friends who were kind enough to invite me to join them for a weekend of day hiking. We hiked the Shadow and Ediza Lakes Trail the day before and I'd thought that that was the most scenic hike I'd completed to date. Then we did this hike... and it took #1 for scenery on my list. Both hikes are fantastic. Now I just keep imagining myself living in a small cottage located in any of the alpine meadows we hiked through on the Twenty Lakes Basin Trail. I could live like a Pika (which we were happy to have seen many of along the way).

We hiked this counterclockwise from the parking area for Saddlebag Lake. Confirming what others have pointed out, there are sections of the trail that can be rough on the feet and ankles due to scree (aka shattered stone). The section of trail approaching Shamrock Lake from Lake Helen is where cairns proved to be very helpful as they were the means to determine the direction of travel over the solid stone surface.

We did this with a group of about 20 friends ranging from 50 to 5 years of age all of us in different levels of fitness. It’s not as easy as Devils Postpile but it’s beautiful. The trails are steep and if your not used to the elevation can make it that much more challenging. We packed up a few poles in hopes to get a golden trout and a few brought swim wear. It was amazing but for a 38 y.o. Who does light waking a few times a week I was winded but my camelbak was my best friend and Motrin was my best friend the next day. Enjoy!!

hiking
16 days ago

This hike is a short, semi-easy day activity. I went on this hike with some of my family members and my dog. For the first mile or so, there is a huge incline that can be pretty tough if you are not used to the altitude. But once you get to the top the views are spectacular. The only problem that i came across was when we got near the lake there were a ton of mosquitos so we ran out of there before we got eaten.

FIVE STARS FIVE STARS!! The lake is absolutely stunning and the hike was very easy/moderate. It is also dog friendly so I would pack your pup, a lunch, and maybe even a couple beers and soak in the view for a while when you get up there! Gorgeous!

hiking
16 days ago

Went on this hike this past weekend with a few friends and my dog, and the views were just breath taking. I must say this hike was a bit challenging at the beginning and the end, but it is totally worth it. You pass by quite a few lakes and creeks, which could be great for some fishing. We even got to see some deer on our hike up there as well as some beautiful trees and flowers. In total with all the turn-offs we did to see the lakes we hiked 10.6 miles. Make sure if you do go on this hike to start as early as possible and pack lots of water and food!

hiking
17 days ago

On our first afternoon camping at Lake Mary, we ventured up the trail to Crystal Lake. With hiking and meandering around the lake, we logged about five miles. The trail to the lake and back is shorter but a steep climb. The views of the Mammoth Lakes are increasingly rewarding the higher you go, especially at the crest when veering left before approaching the lake. Crystal Lake is pristine and worth the light hike around it, too. There was an abundance of wildflowers blooming, especially on the south end of the lake.

hiking
17 days ago

Great day hike. We walked to the trailhead while camping in Coldwater Creek Campground. Partially shaded for the first half of the hike. The switchbacks over the pass to get to Duck Lake is hard, but definitely worth it for the views of Pika and Duck lakes. Although those switchbacks are tough, I would highly recommend this day hike. Bring some snacks/food and be sure to have enough water.

on Tyee Lakes Trail

backpacking
17 days ago

Tough hike with heavy packs due to steep elevation climb (2k gain in under 3 miles), seems to be much more enjoyable when just day hiking. took us 5.5 hrs to get to the 3rd lake due to our pack loads. once arrived we found the perfect camp site close to a good moving stream that connects all the lakes. good fishing, brown and rainbow trout. dog friendly area, not much foot traffic, limited camp sites which in turn means not too many people should you be looking for a place of solitude. mosquitos were not bad at all as long as you bring a good bug spray (we used deet free bug repellent and had no problems). second day we ventured to the 4th lake and went swimming and fishing.....was too tired to try lake number 5. this is a must backpacking trip with lots of scenery and wildlife.

on Tyee Lakes Trail

17 days ago

Tough hike with heavy packs but seems to be much more enjoyable as a day hike. Took us 5.5 hours to get to the 3rd lake due to our loads. Once arrived we found the perfect camp site close to a good moving stream which provided our water source for the duration of our stay. Good fishing, rainbow and brown trout. Dog friendly area and lots of day hikers with dogs. Mosquitos weren’t as bad as I was led to believe. Bring a good bug Spray and you’ll be fine.

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