Bunsen Peak is a 4.4 mile lightly trafficked out and back trail located near Mammoth, Wyoming that features a lake and is rated as moderate. The trail offers a number of activity options and is best used from May until October.

DISTANCE
4.4 miles
ELEVATION GAIN
1,282 feet
ROUTE TYPE
Out & Back

birding

hiking

nature trips

trail running

walking

forest

lake

hot springs

views

wildlife

snow

no dogs

Directions from Mammoth Hot springs: Travel 4.7 miles south. Immediately past the Golden Gate Bridge park on the left in the Glen Creek Trailhead parking lot.

hiking
27 days ago

Beautiful views!!! We felt like we were on top of the world as we ate our lunch. There was snow, ice and mud on the trail making it tricky to get to the top. I suggest to go a little earlier in the season Did it with a 5,9,11,13, and 15 year old and 2 out of shape parents. The whole trip up and down took 5 hours.

1 month ago

Very nice and easy hike. Amazing views. One is the few still open in October.

hiking
1 month ago

This a a great hike with gorgeous views most of the way up. It took us about 1:15-30min to get to the top and that includes a few breaks for water and pictures (and about 45min to hike down). All 4 of us are decently experienced hikers and it was a bit strenuous at times, but not hard. Once at the top, there were some people up there and we decided to keep walking straight for about 5-10 more minutes to an area that had 4 stones to sit on and eat our lunch with 360 degrees of stunning views!

2 months ago

Did this as a loop, going up the Bunsen Peak trail, east off the summit and down to the Osprey Falls trail. The Bunsen Peak trail is excellent. Well maintained with excellent views all the way up. View from the top is outstanding. It looses a star for the crowds, even after Labor Day, and the cell service at the top. This led to cell phones ringing and people texting or on their social media.
You leave everyone behind when you go east off the summit. The down side to that is that the trail isn’t in as good shape. There was a short stretch near the top crossing scree that required some path finding. After that the trail stays near the top of the ridge through mostly burned forest for a mile or so before going down steep switchbacks to a road. The views on the second part of the hike are not as good as on the way up but it’s nice to get away from crowds this close to one of Yellowstone’s major attractions.
Finally, even with my sea level lungs and arthritic knees I’d rate this hike moderate, not hard. There are many hikes rated moderate in AllTrails much harder than this one. Don’t be put off by the hard rating.

2 months ago

Don't be intimidated by the hard rating it is tough but very manageable and the views at the top are breathtaking.

2 months ago

A great hike. Well maintained and mostly clear trail. Easy to walk and maintain a good pace. Beautiful views all the way up. Hiked with my husband and 5 year old daughter.

hiking
2 months ago

being a scientist, of course i had to honor bunsen (burner, lol) peak! i found this hike refreshing after getting bogged down by the crowds on the boardwalk sights. although, it didn't feel like ~2 miles on the ascent. great views at the top.

hiking
3 months ago

Awesome hike. Not too difficult or steep, even at the height of the mountain. It is a long hike for sure, but the 360° view at the top makes it completely worth it. Would do it again and highly recommend.

3 months ago

Sneaky hike - given the distance and elevation gain I was a little skeptical about the “hard” rating, but it lived up to it. One of those hikes which is relentless. Very nice one though, only issue early August 2018 was the smoke coming in from out of State wildfires which made for hazy visibility at distance.

hiking
3 months ago

Really beautiful views and landscape changes - you start out in the woods, then open up to a beautiful meadow, then climbing up some slate! You don’t quite get to escape reality though - the power lines run up the mountain and it’s the only place in the park I got cell service! Suggest putting your phone on airplane mode if you don’t want to be bothered. Took a little less than 2 hours total.

hiking
3 months ago

a lovely hike with plenty of wildflowers, butterflies and scenic views on each bend. just about 2 miles to the top and you can see the edge of the caldera. I didn't opt for the back trail to attest to that portion. but worth adding to your yellowstone hikes!

4 months ago

We hiked Bunsen Peak Pass then descended down the back of the mountain, took the Osprey Falls trail down to the falls and then there ok the Osprey Trail back to the trailhead. Saw mule deer, marmots, and had a brief mouse encounter. It was 10.5 miles total. Very fun and made for a fantastic leg and cardio day. Osprey Falls trail alone would be pretty challenging the last 1.4 miles. Don’t pull up short though. The falls are well worth the effort. Would definitely do it again.

Kent

4 months ago

Great views from top and enjoyed going down via the back way to add distance and away from people.. saw marmot, elk...

4 months ago

Definitely some work to get to the top, but beautiful views! If you’re considering going down the east side of the mountain (towards the old road and Osprey Falls), be ready to add 6 miles to your trip from the peak (not including the falls). We read that it would be 6 miles total and were a little sad to spend an extra 3 miles on a hot road in the sun.

4 months ago

Hiked with husband, 9 yr old and 7 yr old last week, it was great. We started early and had the top to ourself. Last third of the trail was tough, but the kids pushed through and were rewarded by the view. Nice to escape the crowds.

4 months ago

Easy hike with a great view. I've been to the peak 7 times and am still awestruck from the great view.

hiking
4 months ago

Great overall hike. We went right before Memorial day. Took us ~2 hours, from 9a-11a. Because we set out earlyish, we were the first folks up the mountain that day and could really enjoy the solitude. On the way down we passed ~20 people.

Ascending you can see the Golden Gate, and the terraces at Mammoth.

Most difficult part of the hike was the scree at the top. That said, boots (which we wore) or even tennis shoes should be fine.

hiking
5 months ago

Not much trees, but views were awesome.

hiking
5 months ago

The view from the top of the valley was one of my favorites. It’s absolutely beautiful at the top.

hiking
5 months ago

Did this hike May 21 (a week ago). We left early afternoon, and luckily had a great day weather-wise, with a clear view for miles. We ran into a few patches of snow and mud, but nothing not easily navigable with poles and regular boots.

Hike begins in woods, then you begin climbing the mountain via a series of switchbacks. You navigate a fairly steep expanse of scree before reaching the summit. Round trip took about 4 hours. Trail is easily visible and was pretty highly trafficked. Some careful foot placement was required given trail conditions, but this hike seems more on the “medium” end of the spectrum.

3 stars for crowds, and because the views from the summit aren’t particularly outstanding given what’s on offer at the park, and accessible via less painful means. It’s a good workout for sure, and definitely a nice way to spend a half-day.

6 months ago

Great hike. Nice work out and great views at the top!

Saturday, October 21, 2017

Windy and wonderful

hiking
Thursday, September 14, 2017

Enjoyed the beautiful views all the way to the top.

Sunday, August 20, 2017

As relatively new hikers from sea level, this hike winded us but was very rewarding to complete. Great views and not very technical. Say hello to the chipmunks at the top.

Tuesday, August 08, 2017

The hike itself wasn't too bad, though the switchbacks were a little rough. The views on top were breathtaking and worth the climb. In the distance you can see Mammoth and Gardiner, Swan Lake, and other small lakes. I went in the beginning of August so it was a little hazy from fires. The wild flowers were in full bloom and many wild raspberry bushes lined the trail. My group saw a male and female sage grouse on the way down.
The only downside is the noise of cars down below so it isn't as quiet as I would have liked.

hiking
Friday, July 28, 2017

On recommendation of a friend we went on this trail and it was one of my favorite. It was a lovely climb that went through a small forest and field on the way up, a great chance to see lots of little creatures. After getting through the forest and field a steady climb up leads to spectacular views in more than one spot. I could have stayed there all day taking in the 360 views and breathing the fresh air. A must do if you are in Yellowstone.

hiking
Friday, July 21, 2017

A beautiful hike. It was difficult, especially at the top where it was very rocky, but well worth the work-out. A photo journal of our hike can be found here: https://www.youtube.com/watch?v=8o5ZycUp4L0

hiking
Wednesday, July 19, 2017

This trial was moderate (easier than hard) and moderately trafficked (rather than lightly trafficked). The trail passed through grassland, forest and scree. About halfway up is a large rock, shaded by a lone tree, that makes a perfect lunch stop. At the summit, there is a unmanned ranger post, weather station, comms tower.

Excellent trail due to views, variety of vegetation and steadiness of incline.

hiking
Tuesday, July 04, 2017

Half of this trail is covered in beautiful flowers during late June and early July. The upper half is strenuous and very rocky with lots of scree. It is a pretty trail, but it is a true summit. You switch back all the way up and there are no additional fun surprises along the way. For us, the first half with the flowers were pretty and warranted the 4 star rating, otherwise, the second half would probably be 3 stars. We enjoyed the workout but we also enjoyed other views in Yellowstone more.

Friday, June 16, 2017

Phenomenal hike. The incline was somewhat steep, but the views are well worth it. Also make sure to walk past the tower to get a breathtaking view. Remember to sign your name in the log book on the cabin!

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