17.2 miles
Distance
3,446 ft
Climb
-4,453 ft
Descent
2 miles
High Point

Amazing ride from the Hyalite Reservoir parking lot up and over Blackmore then down the South Cottonwood drainage. The route up Blackmore has a lot of hike a bike and in early summer there is snow on the north facing switchbacks.

Detailed Description
Blackmore to South Cottonwood is a 17 mile popular expert route located near Bozeman Montana. This mountain bike primary route can be used both directions and has a extreme overall physical rating. This route includes 4 trails. This route climbs 3,446 ft with a max elevation of 9,650 ft then descends -4,453 ft.
Local Trail Association
Local trail association
Southwest Montana Mountain Bike Association (www.southwestmontanamba.org)
Please consider joining or donating to the local riding association to support trail development & maintenance.
donate to earn trail karma!

12 Reviews & Comments

  • + 0
dadbod420 (Jun 26, 2022 at 20:02)
About 6-7 downee trees between bridge 3 and the history rock intersection. Otherwise riding great with a few standing water sections close to the river.
[Reply]
  • + 0
wolftwenty1 (Oct 3, 2021 at 19:43)
If climbing be ready for some hike a bike. It’s steep and brutal. The decent from Blackmore starts with some switchbacks but then really sick trail after that.
[Reply]
  • + 0
wolftwenty1 (Oct 3, 2021 at 19:42)
As noted, it’s more of a connector. The guy talking about the climb being brutal up Blackmore. It for sure is…but that’s technically a different trail Smile
[Reply]
  • + 1
tlilly (Sep 27, 2021 at 6:52)
Beautiful backcountry trail. Much thanks for SWMBA for cutting out the trees each year. This trail deserves the love. Technical, but a ton of fun descending from Blackmore.

Fall colors were stunning in late September.
[Reply]
  • + 1
tlilly (Sep 27, 2021 at 6:51)
Beautiful backcountry trail. Much thanks for SWMBA for cutting out the trees each year. This trail deserves the love. Technical, but a ton of fun descending from Blackmore.

Fall colors were stunning in late September.
[Reply]
  • + 0
masonskis (Aug 13, 2021 at 20:51)
Edit last comment, Storm Castle RIDGE not Divide
[Reply]
  • + 0
masonskis (Aug 13, 2021 at 20:47)
Lame trail on it’s own, but must be endured if looping Blackmore/South Cottonwood or Wheeler/Storm Castle Divide
[Reply]
  • + 0
masonskis (Aug 13, 2021 at 20:44)
Not that great, no flow. Good connector though for big loops incorporating Wheeler, History, Blackmore, etc etc.
[Reply]
  • + 0
Zaner3 (Sep 9, 2020 at 12:11)
Trails dry, a 2 downs trees.
[Reply]
  • + 0
Zaner3 (Aug 20, 2020 at 8:00)
Rode up mount Blackmore, definitely some hike a bike on the way up. Rode down to south cottonwood, trail is pretty overgrown countless down trees, and the bad avalanche debris. Wouldn’t recommend unless you want a hard trail with lots of on and off your bike. Beautiful country tho.
[Reply]
  • + 0
RadChilla (Aug 12, 2020 at 18:46)
Uffda. Even if all the trees were cleared, the ~3 miles up to Blackmore after the last fork are basically unbikeable. Spare yourself the misery.
[Reply]
  • + 0
benstill1 (Jul 10, 2020 at 21:57)
Pretty hard to navigate the huge avalanche slide debris. 7/10/2020
[Reply]





Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • Horse
    • Hike
    • Trail Running
  • Difficulty rating
    Black Diamond
  • Route Type
    Shuttled
  • eBike Allowed
  • Bike type
    AM, XC, Fat
  • Direction
    Both Directions
  • Physical rating
    Extreme
  • Ridelogs
    1
More Stats for Blackmore to South Cottonwood mountain bike route
  • Altitude change
    -1,008 ft
  • Altitude min
    5,716 ft
  • Altitude start
    6,723 ft
  • Altitude end
    5,715 ft
  • Grade
    -1.1%
  • Grade max
    -63.7%
  • Grade min
    70.8%
  • Distance climb
    6 miles
  • Distance down
    9 miles
  • Distance flat
    2 miles
no votes yet
close
3D
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)
Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
  • bi-directional trail
  • no data
Trail Last Ridden
Trailforks scans ridelogs to determine the last time a trail was ridden.
  • < 2 days
  • < 1 week
  • < 2 weeks
  • < 1 month
  • < 6 months
  • > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
  • Downhill Only
  • Downhill Primary
  • Both Directions
  • Uphill Primary
  • Uphill Only
  • One Direction
Contribute Details
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
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.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches

Radar Time
x Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
  • 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
Heatmap of where riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
Trails Deemphasized
Trails are shown in grey.
disable
Only show trails with NO bikes.
enable

Save the current map location and zoom level as your default home location whenever this page is loaded.

Save
Trail transparency
12
22
41
29

Recent Trail Reports Along Route

statustraildateconditiondescription
South Cottonwood (Upper)
Sep 27, 2022 @ 1:45pm
Sep 27, 2022
Still tons of trees down, passable none the less
Blackmore to Reservoir Connector
Sep 27, 2022 @ 1:45pm
Sep 27, 2022
South Cottonwood (East Branch)
Sep 27, 2022 @ 1:45pm
Sep 27, 2022
Some trees down towards the bottom, some have a ride around, others require dismount.
South Cottonwood (Lower)
Aug 30, 2022 @ 6:21am
Aug 30, 2022
more reports »
  • By generaldudebro SWMMBA & contributors
  • #29765 - 493 views