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1,883 ft
Distance
4 ft
Climb
-75 ft
Descent
00:01:21
Avg time
-72 ft
Altitude change
757 ft
Altitude min
828 ft
Altitude max
828 ft
Altitude start
758 ft
Altitude end
-3.8%
Grade
-25.4%
Grade max
8.7%
Grade min
213 ft
Distance climb
1,302 ft
Distance down
371 ft
Distance flat
00:01:21
Avg time
Stump Grub Details
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Activities
- Mountain Bike
- E-Bike
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Riding AreaProving Grounds
Dubuque, Iowa -
Difficulty Rating
-
Local Popularity45 in Mountain Biking [+]
- 85 in E-Biking
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Global Ranking
-
State Ranking
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Trail TypeSingletrack
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Bike TypeDJ
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DirectionOne DirectionPopular Direction Shown
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Dogs AllowedYes
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eBike Allowed
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TTFs on TrailDrop, Jump, Rock Garden
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Land OwnerDubuque County Conservation Board
No community description for Stump Grub trail has been added yet!
AI Generated Description
Stump Grub is a 1,883 ft moderately popular black diamond difficulty singletrack trail located near Dubuque Iowa. This mountain bike primary trail can be used one direction. It features drop, jump and rock garden. On average it takes 1 minutes to complete this trail.
Local Trail Association
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Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 2 rides
- 8 miles average
6 Months
- 23 rides
- 8 miles avg distance
All
- 215 rides
- Last: Nov 1, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Stump Grub 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)
Trailforks scans users activity logs 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 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.
- most popular
- popular
- less popular
- 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
Most Popular
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 stump-grub trailhead
(42.558890, -90.703800)
Photos
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Videos
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Trail Lists
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Proving Grounds
17 trails
Routes with this trail
★ 5.0 • 8 miles • 857 ft • 23 •
Good way to run all the fun and gnarly parts of Proving Grounds
6 miles • 669 ft • 17 •
Proposal for IMBCS Race. Route does not cross over itself
Jurassic Jam MTB Race Route 2020 Archived
5 miles • 458 ft • 10 • Out & Back • Race •
One lap for all age groups and skill levels. Age groups: 13-17, 18-25, 26-35, 36-45, 46+ Awards for 1st...
darkins44
Great and fast. A couple of hard to see doubles at full speed however so don't boost everything on your first run.
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Nearby Trails
- Skidder Connector 764 ft
- Skidder Point 1,102 ft
- Drop & Catch 1,152 ft
- Ride Control 1,171 ft
- Skidder Loop 1,230 ft
- By berrthum
TMBR & contributors - #295626 - 1,193 views
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