Chestnut Mountain to Frog Rock Trail

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Langhor Park

Chestnut Mountain to Frog Rock Trail is a 13.8 mile lightly trafficked out and back trail located near Bozeman, Montana that features beautiful wild flowers. The trail is rated as moderate and offers a number of activity options. Dogs and horses are also able to use this trail.

Length13.8 miElevation gain2,519 ftRoute typeOut & back
dog friendlyHikingHorseback ridingNature tripsWalkingBird watchingrunningForestViewsWildflowers
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Weather
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Reviews (65)
Photos (51)
Recordings (62)
Completed (125)
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Zach Huston
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Hiking

When covered with snow this trail is probably more on the hard rating. The lower portion isn’t bad. But once we got up to the ridge, there really wasn’t a fresh path in the snow and I was post holing up to my knees. Views at the top were incredible

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Austin Miller
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Hiking
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Austin Miller
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Hiking
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Bryson Hightower
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Hiking

Very nice trail. Good views. Little long with so many turns but not terrible.

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Mike Hassett
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HikingIcy

Beautiful hike but definitely need right gear to walk through a lot of mud and ice.

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Kayla Waisath
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HikingGreat!

Trails was well maintained. Took awhile to get away from the road, but overall enjoyed the views. Some climb, but lots of flat stretches as well. Would recommend if coming from Bozeman airport.

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Laura Christian
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Hiking

Didn't do the full trail. Great views along the way. Saw a moose.

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Ron Youde
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Hiking
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Erin Zimmerman
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Great!

Beautiful forest views. Little stream at the beginning. Nice incline. Couldn’t finish because I went with my parents who had knee issues :/

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Keyton Gines
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Mountain bikingGreat!Over grownRocky
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Mikayla M
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Hiking

Beginning is a bit steep but not terrible. Towards the end of the hike it’s difficult to tell where to go but then opens up to different trail options.

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L F
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HikingRockyScramble

Lots of yellow Glacier Lilies on the trail. A few purple flowers and one magenta. At this moment before leaves fill in, there are lots of breathtaking views. Trail from Chestnut TH is in good shape. Lots of little water crossings. The spur to Frog Rock has a lot of trees down over trail and rocks to climb over. If you are out of shape or can’t lift legs to climb over things than forget it. I expect the trail will change in the next week due to the large amount of rain expected. Came out of spur and headed up to Chestnut Ridge and that was in good shape too. I’d call the trail moderate but if you take the spur and go beyond the climbing area of Frog Rock it requires a lot of climbing/ flexibility and increases to difficult for some people. Happy hiking and pick up your dog crap!

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Robert Olejar
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HikingIcySnow

Trying to walk on a sideways ice trail was a challenge. Sometimes we had snow a foot deep and other times it was a sheet of ice. In the end it was difficult but worth it.

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Cathy Webster
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Hiking

Great out and back-. I needed to turn at 2.5 miles- great views and work out for the time allowed.

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Jeff Tipton
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HikingRocky

I hiked this trail to the top of Chestnut Mountain Sunday 06/30/2019. It's a nice trail but nothing spectacular. A variety of little things bothered me. For most of the trail there is no visibility for any viewing. There are a few spots where you can stop and see the landscape below and also the rocks but overall the view is blocked with trees. Even at the top of Chestnut Mountain you can't see much to the west or north. The trail is a single track for about 70% of the way. The bikers were all respectful and moving slow enough that you had time to get out of the way, but in a lot of places there was nowhere to go but to leap into the high weeds and bushes. That leads to the next concern - snakes. I saw one in the trail that moved away as I approached, but, frankly, I'm not interested in leaping into high grass to avoid a biker only to land on a snake. It didn't happen but I'd rather have some room. The trail if taken all the way to the top will give you a good workout and will take anywhere from 1.5 to 2.5 hours to get to the top depending upon your fitness level. I would do it again but it's not high on my list.

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Sudy M
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HikingMuddySnow

Trail is good up until the last 1.5-2 miles to the top. Turned around about .75 from peak because didn’t want to deal with the snow but totally doable and lovely!!

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Warren F
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HikingSnow
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Madelyn Hoefer
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Hiking

The trail was beautiful with views of mountain ranges, wild flowers and open plains. We ended up hiking around 12 miles roundtrip. The only downside is the close proximity to the freeway, but this could also be viewed as a plus if you’re looking for a easy to access trail.

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Samantha D
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Hiked up to Chestnut Mountain which is about 4.8 miles out from the trailhead...so 9.6 miles roundtrip. This was suffice for me as I was hiking for views. Great view of Frog Rock from the Chestnut Mountain trail.

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K Burgess
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Hiking

Walked 3 miles in and then back. Good steady uphill pull. Recent snow/rain made for a bit of mud but not bad. I wouldn't classify this as grueling but it might be if you are not a regular exerciser.

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Jenna Rhoads
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Hiking

Went to the top of Chestnut Mountain versus going to Frog Rock - a great hike with beautiful views of the valley and other mountains, and not too many people. We went up about 4.8 miles to the top of the mountain making the round trip hike a little less than 10 miles. Pack a lunch and enjoy it at the top! http://m.outsidebozeman.com/?url=http%3A%2F%2Fwww.outsidebozeman.com%2Fplaces%2Ftrails%2Fbiking-trails%2Fchestnut-mountain-trail&utm_referrer=#2824

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Kurt Percy
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Good trail, nice length with some great views. traffic was more moderate than light, so if you're looking for privacy this might not be the trail for you. The first 1/3rd of the trail can be a bit grueling with a continuous, sometimes steep incline. Some fun and accessible rock climbing at Frog Rock with wonderful views. Good trail for wildflowers if you're looking for some nature photo opportunities.

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Sylvia Drain
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You lose the highway noise quickly. The wild glowers and views are incredible. You 'll see the Bridgers and Abarokas on this hike. The elevation gain is greater than it says here. Steep. But doable. Go to the next switchback and then the next. It 's worth it .

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Travis Walter
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Hiking
First to Review

This was a great trail. Would be five stars without the highway noise. Nice views, definitely worth checking out. I got within 15 yards of a chattering rock chuck, and flushed a blue grouse.

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Anthony Clark
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Hiking
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