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3,266 ft
Distance
25 ft
Climb
-115 ft
Descent
00:04:22
Avg time
-90 ft
Altitude change
146 ft
Altitude min
235 ft
Altitude max
235 ft
Altitude start
146 ft
Altitude end
-2.742%
Grade
-18.957%
Grade max
12.226%
Grade min
459 ft
Distance climb
2,355 ft
Distance down
452 ft
Distance flat
00:04:22
Avg time
Underworld Details
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Activities
- Mountain Bike
- E-Bike
- Hike
- Trail Running
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Riding AreaGonzales Caynon Open Space
San Diego, California -
Difficulty Rating
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Voted DifficultyBlue (1 vote)
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Local Popularity85 in Mountain Biking [+]
- 90 in E-Biking
- 60 in Trail Running
- 5 in Hiking
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Global Ranking
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State Ranking#2,570 in Mountain Biking · California [+]
- #431 in E-Biking
- #7,036 in Trail Running
- #14,573 in Hiking
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Trail TypeSingletrack
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Bike TypeAM, XC
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DirectionBoth Directions
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Climb DifficultyGreen
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Physical RatingModerate
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Dogs AllowedYes
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eBike AllowedYes up to Class 1
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Land OwnerCity of San Diego
No community description for Underworld trail has been added yet!
AI Generated Description
Underworld is a 3,266 ft popular green difficulty singletrack trail located near San Diego California. This mountain bike primary trail can be used both directions and has a moderate overall physical rating with a 25 ft green climb. On average it takes 4 minutes to complete this trail.
Local Trail Association
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-
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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
- 1 rides
- 23 miles average
6 Months
- 49 rides
- 18 miles avg distance
All
- 463 rides
- Last: Oct 30, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Underworld Trail Reports
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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.
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- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
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US Cell Coverage
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Radar Time
Activity Recordings
Trailforks uses anonymized public activity data.
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Activity Recordings
Trailforks uses anonymized public activity data.
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Winter Trails
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A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
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
Trails Deemphasized
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Directions to underworld trailhead
(32.961030, -117.195780)
Photos
3 more »
Videos
4 more »
mtb
8:24 |
117 |
Nov 4, 2024 , San Diego
mtb
0:01 |
217 |
May 17, 2024 , San Diego
mtb
4:25 |
124 |
Mar 19, 2022 , San Diego
mtb
4:10 |
75 |
Oct 12, 2015 , San Diego
Routes with this trail
★ 5.0 • 24 miles • 991 ft • 37 • Loop •
A loop from PQ Canyon, along the beach, and back. To ride on the sand, only low tide works. If tide isn't...
25 miles • 1,124 ft • 14 • Loop •
I wanted to make a PQ loop that avoided Eucalyptus for my CX/Gravel Bike. Ridden on 19Jul20, although the...
melmikulak
Fun, mini-tunnel (trees) area with dips and bumps. Easy to navigate, very little overgrowth and we’ll used.
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Nearby Trails
- Del Mar Flow Trail 0 ft
- Blazing Star 948 ft
- Upperworld 1,063 ft
- Gz Connector 2,598 ft
- Tree House Drop 2,890 ft
Gonzales Caynon Open Space
- By brianpetry
TRAILFORKS & contributors - #136237 - 1,471 views
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