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2.5 miles
Distance
10 ft
Climb
-1,515 ft
Descent
00:14:25
Avg time
-1,508 ft
Altitude change
9,419 ft
Altitude min
10,934 ft
Altitude max
10,927 ft
Altitude start
9,419 ft
Altitude end
-11.4%
Grade
-64.7%
Grade max
4.8%
Grade min
420 ft
Distance climb
2 miles
Distance down
364 ft
Distance flat
00:14:25
Avg time
Upper Skid Marks Details
-
Activities
- Mountain Bike
- E-Bike
- Adaptive Bike
-
Riding AreaMammoth Mountain Bike Park
Mammoth Lakes, California -
Difficulty Rating
-
Voted DifficultyBlack Diamond (2 votes)
-
Local Popularity55 in Mountain Biking [+]
- 55 in E-Biking
- 5 in Adaptive Biking
-
Global Ranking
-
State Ranking
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Trail TypeSingletrack
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Bike TypeDH, AM, Adaptive MTB
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DirectionDownhill OnlyPopular Direction Shown
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Dogs AllowedYes
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eBike AllowedYes up to Class 1
Extremely rocky trail that drops off of the top of the mountain. The top of Skid Marks has beautiful views of the lakes basin, but you'd best keep your eyes on this unrelenting trail.
Access Info
Take the Panorama Gondola to the summit. After exiting the gondola building, take a left and go behind the building. The trail splits from Off the Top after about 400 yards.
Adaptive Bike Info
aMTB Black Rating: Advanced obstacles exist, some trail obstructions.
Crossing the exposed pumice field at the top is a little sketchy
Trail Supporters
USFSLand Manager
Bike Park
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 0 rides
6 Months
- 17 rides
- 23 miles avg distance
All
- 121 rides
- Last: Oct 17, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Upper Skid Marks Trail Reports
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3D
Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- 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 users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
Trailforks scans activity logs 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 activity logs 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 activities = more kinetic energy = warmer colors.
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- popular
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- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches
US Cell Coverage
Legend
Radar Time
Activity Recordings
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?
Activity Recordings
Trailforks uses anonymized public activity data.
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Winter Trails
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Missing Trails
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Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
BC Backroad Status
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Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.
Slope Aspect
Direction the slope faces
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Directions to upper-skid-marks trailhead
(37.628040, -119.030800)
Photos
17 more »
Videos
7 more »
mtb
11:57 |
225 |
Aug 27, 2025 , Mammoth Lakes
mtb
9:59 |
431 |
Sep 12, 2021 , Mammoth Lakes
mtb
6:04 |
2331 |
Oct 5, 2019 , Mammoth Lakes
mtb
0:58 |
390 |
Aug 5, 2018 , Mammoth Lakes
Trail Lists
-
Mammoth Mountain Bike Park
48 trails
Routes with this trail
7 miles • 45 ft • 6 •
I have a love/hate relationship with Skid Marks. It’s worth doing (at least to mix it up from the top)...
Trail Products
6 Reviews & Comments
huntert09
Certainly a rough trail but not a double black. Not many technical moves just long and rough
mikepea
Just rode this, as an intermediate rider comfortable with all the single blacks at Mammoth. If you’re ok with shotgun, you’ll be fine on this. It’s the most techy trail from the top of the mountain, and whilst it’s kinda loose and rocky at the start you can control your speed. I was riding an olde 26er 140mm full sus, it coped fine though my hands were sore from braking by the end of it!
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Nearby Trails
- Off The Top 226 ft
- Velociraptor Connector 1,234 ft
- Off The Top Road 1,253 ft
- Upper Eliminator 1,253 ft
- Toll Road 1,936 ft
Mammoth Mountain Bike Park
- By TheAngryTomato TRAILFORKS & contributors
- #25022 - 4,572 views
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