16.1 miles
2,520 ft
-2,990 ft
2 miles
High Point

The Buffalohorn to Porcupine ride is a classic Big Sky backcountry ride that takes you to a pristine alpine lake and gives you many miles of incredible backcountry views.

Detailed Description
Buffalohorn to Porcupine is a 16 mile less popular expert route located near Castlemaine. This mountain bike primary route can be used both directions and has a hard overall physical rating. This route includes 11 trails. This route climbs 2,520 ft with a max elevation of 8,775 ft then descends -2,990 ft.
Route Supporters
Local Trail Association
Local trail association
Castlemaine Rocky Riders (www.rockyriders.com)
Please consider joining or donating to the local riding association to support trail development & maintenance.
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Trail Products

15 Reviews & Comments

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Trails in Route


  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • E-Bike
    • Trail Running
  • Difficulty rating
    Black Diamond
  • Route Type
  • eBike Allowed
  • Bike type
  • Direction
    Both Directions
  • Physical rating
  • Ridelogs
More Stats for Buffalohorn to Porcupine mountain bike route
  • Avg time
    3 hr 26 min
  • Altitude change
    -470 ft
  • Altitude min
    6,135 ft
  • Altitude start
    6,606 ft
  • Altitude end
    6,135 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    7 miles
  • Distance down
    8 miles
  • Distance flat
    1 mile
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Trail Conditions
  • Unknown
  • Snow Groomed
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  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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Trail transparency
Buffalo Horn to Porcupine Creek - Big Sky, MT...
Buffalo Horn to Porcupine Creek - Big Sky, MT Backcountry
10:39 | 244 | comments: 0 | favs:
Dec 1, 2021

Recent Trail Reports Along Route

Porcupine Creek #34
Sep 6, 2023 @ 6:17pm
Sep 6, 2023
Total junk show, stream running down trail in spots, horse f’d as usual, six track, and the dirt is composed of 99% horse crap. Use Grizzly Bear x tension for a slightly better experience.
Porcupine Creek
Sep 6, 2023 @ 6:10pm
Sep 6, 2023
Extremely muddy from recent rain, plus innumerable mud holes that won’t dry up this year. Do not recommend.
Buffalo Horn Creek
Aug 9, 2022 @ 12:26pm
Aug 9, 2022
Torn to shreds from horse use. Not recommended for uphill travel. Downhill travel was fine
more reports »
  • By ianjones SWMMBA & contributors
  • #22320 - 861 views