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

We hiked this trail from the lava creek trail head parking lot out towards Undine Falls and back again. Steep downhill to get to the suspension bridge crossing the Gardiner River - a fun trail addition, especially the signs warning people not to try and get their horses to cross the bridge!
You’ll walk through tall sagebrush and grasses, so be sure you have bug spray as well as your bear spray.
We ran into three other hikers and spotted some elk grazing by the river.
The trail shows signs of being VERY muddy earlier in the year, making the footing somewhat difficult. Hikers and large wildlife had churned it up pretty good, and it dried into a lumpy mess. Boots are a must here.
We saw lots of signs of wildlife and an elk carcass, but no large animal sightings except the two elk. We started our hike at 9:30 am. Very pretty scenery along the river and at one spot in the trail you are close enough to get down to it.

Hiked from Lava Creek Trailhead to Mammoth Campground. It's almost all downhill this direction. Had the trail to ourselves; a rarity in Yellowstone. Beautiful, easy 4 miles.

We started at trailhead near Undine falls. Hiked to get a closer view of falls about 1/2 mile

10 months ago

I spent three days in this area with my two sons, 9 and 15. The scenery is incredible! They loved every minute of it, and so did I. There were many signs of bears this area but we never saw one.

horseback riding
Tuesday, September 26, 2017

Nice trail for a 2 hours tour go and return with break at the riverside.

Wednesday, September 20, 2017

Hiked in to a backcountry site passed the Yellowstone River suspension bridge. The hike in as most enjoyable with amazing views of landscape and the surrounding mountains. After crossing the suspension bridge we saw what I believe to be an osprey and a bison carcass. The hike out was a bit tonight due to the overnight rain and snow making the trail slick and wet. Overall an amazing hike with many views!!!

Friday, August 04, 2017

Hike into great camping along the Yellowstone River.

We left one car at Mammoth visitors center and drove the other to the trailhead. This was a great trail with amazing views. It dips down by the Uline Falls close to the top and then you essentially walk downhill all the way to the Gardener river where you cross on an extension bridge. This is where most would turn back but if you are going one way only, note that you need to walk around the construction area and through the Mammoth Campground.

Monday, May 15, 2017

Easy. Saw a coyote stalking geese in the pond near the trailhead, then saw some antelope.

Wednesday, March 01, 2017

Great views of meadows and mountains. Saw a black bear, and a Bison. Fairly easy going in, fairly strenuous coming out. Bring water and a camera.

Friday, October 28, 2016

Great trail but keep in mind you'll be going mostly uphill on the way back.

Leaving from Mammoth Campground around 2:30 PM, we walked down the hillside, crossed North Entrance road (Highway 89), to make our way to the Lava Creek trailhead. We made our descent down towards the Gardner River.

The trail is not always well marked, so we built a few trail cairns from rocks as we went along in order to mark the way back. It helps to have a good map, and be fairly good at orienteering.

Parts of the trail were in rather poor condition. A heavy rain that had created mud, and then was heavily traveled, not by humans but by the wildlife in the area. We rarely saw a human footprint, so if you would like a lightly human-traveled trail, this is the one. We did not see another person on the trail.

The trail needed some maintenance to be called easy. I would place it at moderate with the conditions we traveled. We did not bring our hiking poles thinking that it would be easier than it was. My suggestion would be to bring a hiking pole for at least the comfort of having it along if needed.

The trail is heavily traveled by unseen wildlife. We saw evidence of a large kill such as elk or bison (vertebrae) by the side of the trail. (See photo.)

The trail was churned up from wildlife use after bad rain and in some places could be an ankle twister if not careful. On our return, the rain started but it was mostly a soft misty rain.

My favorite parts of the hike were the suspension bridge and seeing Undine Falls. My boyfriend's favorite parts of the hike were also the suspension bridge and the elk that we saw on the hike back to the campground. We did a lot of singing on the trail (bear deterrent) and the elk were very curious about us. They just looked though, and didn't move towards us.

NOTE: Great views of Gardiner River and Undine Falls. On the return, a good far off view of Mammoth.

We got back to camp with a bit of cushion before dark; probably around 7 PM. The churned up trail made our hike longer than the 3 hours indicated.

Thursday, August 28, 2014

Awesome views along the Yellowstone River! Very cool suspension bridges that we crossed. Hiking out back to the road was killer with a 1000 foot elevation gain in about 3 miles, but a great sense of accomplishment. We stayed at campsite IY5 which was amazing and right next to the river with tree coverage. We hiked about 18.5 miles and hitchhiked back to our car which was parked at hell roaring. We topped our trip off by soaking in the Boiling River. Great time!!

Wednesday, April 24, 2013

Finding the trail head was a little tricky. But once I got there, I discovered that there were apparently two trail heads that converge near a suspension bridge.

I began the trail near a small, wobbly suspension bridge over Gardner River. I wasn't bothered by the bridge having crossed other suspension bridges before. From there, I hiked along the river through sage brush to the convergence of Lava Creek and Gardner River, and walked along it through the canyon. Along the trail I saw mule deer, elk, bison, and a bald eagle. I saw old paw prints of black bear and coyote along the trail. There are a lot of basalt and travertine rocks strewn everywhere too. Near the waterfall is a moderately steep walk up to the shelf next to the waterfall.

The waterfall is approximately 100 feet tall in 3 tiers. I could literally walk close to the brink. From that vantage point, I could see the Undine Falls pullout vantage point too.

During warm and hot weather, I recommend head gear since part of the trail is through tall sagebrush, where ticks like to base jump to their victims.

Saturday, November 05, 2011

We chose this trial because of the backcountry campgrounds along the way. We were backpacking with kids and the campgrounds are close enough to the trailhead that it worked well for young kids (4+). It's a bit of a haul up the grassy hill in the first mile. After that, it heads down into the canyon of the Yellowstone River. There is solid fly fishing for Brook Trout in Blacktail Deer Creek.

From NPS: "This trail follows Blacktail Deer Creek as it descends 1,100 feet through rolling, grassy hills and Douglas-fir where it reaches the Yellowstone River. The trail continues across the Yellowstone River on a steel suspension bridge and joins the Yellowstone River Trail."

5 months ago

Monday, September 18, 2017

Thursday, September 14, 2017

Friday, August 07, 2015

Friday, June 15, 2012

Friday, September 23, 2011