Mile 18
- 8 routes
- V4 – V12
- Bouldering
- Jul–Sep
- best months
Is Mile 18 open right now?
Closure in the area
There's a closure order in Yellowstone Ranger District. It doesn't name Mile 18, so check the source for the area it covers (13 listed).
East Fork of the Mill Creek Trail Bridge Stock Closure
Agency closure covering Yellowstone Ranger District · Order 01-11-04-26-03 · USFS · Yellowstone Ranger District
NFSR #1700 South Plateau Road Closure
Agency closure covering Custer Gallatin National Forest · USFS · Custer Gallatin National Forest
Hyalite Porcupine Buffalo Horn Summer Interim Travel Order and Map and Order # 01-11-00-26-02
Agency closure covering Custer Gallatin National Forest · Order 01-11-00-26-02 · USFS · Custer Gallatin National Forest
Hyalite Porcupine Buffalo Horn Winter Interim Travel Order and Map Order Number: #01-11-00-26-01
Agency closure covering Custer Gallatin National Forest · USFS · Custer Gallatin National Forest
Glacier Lake Road #2421 Closure Order Number: # 01-11-82-26- 01
Agency closure covering Custer Gallatin National Forest · Order 01-11-82-26- · USFS · Custer Gallatin National Forest
As of · Source: USFS · Yellowstone Ranger District. Agencies don't list every closure — check before you go.
Mile 18 is a climbing area in the Yellowstone Ranger District of Custer Gallatin National Forest in Montana, managed by the Forest Service. Its name points to a spot roughly 18 miles along a route through this part of the forest, and it sits among a cluster of trails, campsites and other destinations that make it an easy base for exploring the surrounding area. Summer is the most comfortable time to visit. Typical averages from the nearby Mystic Lake weather station show July highs around 75°F with lows near 50°F, while winter highs stay around 34°F with lows in the teens. Fourmile Cabin, about a mile away, is the closest campground, and the Meatrack and Fourmile hikes start within about a mile and a half. Upsidedown Creek is about 2.5 miles off.
Best time to go · Jul–Sep
Best time to visit Mile 18
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.
Jan
34° / 18°
8 wet
Feb
34° / 17°
9 wet
Mar
41° / 22°
11 wet
Apr
48° / 27°
12 wet
May
57° / 35°
14 wet
Jun
66° / 43°
14 wet
Jul
75° / 50°
12 wet
Aug
74° / 50°
11 wet
Sep
65° / 42°
10 wet
Oct
52° / 32°
10 wet
Nov
40° / 24°
9 wet
Dec
33° / 18°
9 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Mystic Lake, MT, 25 mi away at 6,544 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
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