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 moderately 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
Loose Riders Victoria (loose-riders.com)
Please consider joining or donating to the local riding association to support trail development & maintenance.
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Trail Products

1 Review & Comments

  • + 0
MontanaDan (Jul 10, 2021 at 17:13)
Great ride up Buffalo horn and out Porcupine. Sweeping meadows and challenging but do-able climbs on the way up. Trail conditions are great but be bear aware and announce your presence in the tree sections as there’s plenty of fresh grizzly sign. A couple of hike-a-bike sections towards the top will reward you with a visit to Rams Horn lake. The downhill pit porcupine would be special if it weren’t for the fallen trees. Antonine really getting off the bike every 10-30 seconds to navigate the down timber. If your biking July-September take excessive amounts of deep woods bug spray as the horse flys, deer flys, sticky flies and mosquitos can be maddening. Otherwise epic, beautiful ride. This trail is not for the out of shape rider. The porcupine out section should be listed as a black diamond. One of the most scenic rides in Big Sky!
July 10, 2021

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
  • 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
no votes yet
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Inadequate
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Flow (Ridden Direction)
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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Trail Ridden Direction
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  • Both Directions
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Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months. Trails are compared with nearby trails in the same city region with a possible 25 colour shades. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
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Radar Time
x Activity Recordings
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  • mountain biking recent
  • mountain biking (>6 month)
  • hiking (1 year)
  • moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
  • Downhill Ski
  • Backcountry Ski
  • Nordic Ski
Jump Magnitude Heatmap
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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 | 113 | comments: 0 | favs:
Dec 1, 2021

Recent Trail Reports Along Route

Porcupine Creek
Oct 16, 2022 @ 10:21am
Oct 16, 2022
One tree down. Otherwise in good shape. Big ups to the volunteers who recently cleared the trail (aside from the one new downed tree)!
Porcupine Creek #34
Aug 20, 2022 @ 1:53pm
Aug 20, 2022
Dry and clear. Narrow and pedal grabby in spots.
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 - 615 views