Montana · Hiking

Green Mountain

Green MountainPhoto: Forest Service - Northern Region, Public Domain Mark (via Flickr)
11.0 mi
round trip
1,158 ft
climb
6,749 ft
high point
Out and back
route
Jul–Sep
best months

Is Green Mountain open right now?

Closure in the area

There's a closure order in Yellowstone Ranger District. It doesn't name Green Mountain, so check the source for the area it covers (13 listed).

As of · Source: USFS · Yellowstone Ranger District. Agencies don't list every closure — check before you go.

Green Mountain is a hard hike in the Yellowstone Ranger District of Custer Gallatin National Forest in Montana, managed by the Forest Service. The route is an out-and-back of about 11 miles, with a one-way elevation gain of 1,158 feet, starting at roughly 5,183 feet and climbing to about 6,749 feet at the high point. Summer is the most comfortable time to go. Typical averages from the nearby Mystic Lake weather station, at a similar elevation, show July highs around 75°F with lows near 50°F, while winter highs stay in the low to mid 30s. The trail is open from June 1 to November 30, and the parking area is named Green Mountain. Bikes and horses are both allowed on the natural-surface route. Climbers will find Blueberry Wall about 0.2 miles away and Porcelain Wall about 0.4 miles away. The East Rim of Natural Bridge hike is about half a mile off, and East Boulder campground is about 2.5 miles away.

Local outfitters

Not on Roamze yet. Their page has how to reach them.

  • Best time to go · Jul–Sep

    Best time to visit Green Mountain

    Best months: July–September. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

    1. Jan

      34° / 18°

      8 wet

    2. Feb

      34° / 17°

      9 wet

    3. Mar

      41° / 22°

      11 wet

    4. Apr

      48° / 27°

      12 wet

    5. May

      57° / 35°

      14 wet

    6. Jun

      66° / 43°

      14 wet

    7. Jul

      75° / 50°

      12 wet

    8. Aug

      74° / 50°

      11 wet

    9. Sep

      65° / 42°

      10 wet

    10. Oct

      52° / 32°

      10 wet

    11. Nov

      40° / 24°

      9 wet

    12. Dec

      33° / 18°

      9 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Mystic Lake, MT, 30.9 mi away at 6,544 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Keep exploring — more trails worth the drive

East Rim of Natural BridgePhoto: Forest Service - Northern Region, Public Domain Mark (via Flickr)

East Rim of Natural Bridge

Next door

0.66-mile out-and-back trail along the east rim of Natural Bridge in Montana.

Grouse CreekPhoto: Forest Service - Northern Region, Public Domain Mark (via Flickr)

Grouse Creek

~8 min drive

13.39-mile out-and-back trail in Montana with 2,625 ft elevation gain.

Initial CreekPhoto: Jstuby at en.wikipedia, Public domain (via Wikimedia Commons)

Initial Creek

~26 min drive

6.79-mile out-and-back trail at Initial Creek in Montana with 467 ft of elevation gain.

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Falls Creek

~7 min drive

9.53-mile out-and-back trail in Montana with 3,782 ft elevation gain.

Blacktail LakePhoto: Matt Lavin, CC BY-SA 2.0 (via Flickr)

Blacktail Lake

~19 min drive

0.71-mile out-and-back trail to Blacktail Lake in Montana with 150 ft of elevation gain.

FourmilePhoto: Forest Service - Northern Region, Public Domain Mark (via Flickr)

Fourmile

~25 min drive

Fourmile is a 14.85-mile out-and-back trail in Montana with 3011 feet of elevation gain.

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Boulder River-Great Falls Trail

~7 min drive

1.92-mile out-and-back trail in Montana with 1,249 ft elevation gain/loss

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Elephanthead

~18 min drive

10.32-mile out-and-back trail in Montana with 5,698 ft elevation gain.

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Lost Creek

~10 min drive

2.52-mile out-and-back trail in Montana with 629 ft gain.

MeatrackPhoto: Forest Service - Northern Region, Public Domain Mark (via Flickr)

Meatrack

~24 min drive

9.06-mile out-and-back trail in Montana with 1,031 ft elevation gain.