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25.3 miles
Distance
5,728 ft
Climb
-5,674 ft
Descent
1 mile
High Point
52 ft
Altitude change
1,133 ft
Altitude min
1,164 ft
Altitude start
1,217 ft
Altitude end
-80.8%
Grade max
67.1%
Grade min
14 miles
Distance climb
11 miles
Distance down
5,043 ft
Distance flat
Mt wilson mega ride. load up the camelback, this is an all day event.
Detailed Description
Mt. Wilson Mega is a 25 mile popular extreme route located near Altadena California. This mountain bike only route. This route includes 31 trails. This route climbs 5,728 ft with a max elevation of 5,394 ft then descends -5,674 ft.
Trail Issues on Route
- Closed: 2 trails (newest: Jul 2, 2026)
- Minor Issue / Yellow: 6 trails (newest: Oct 30, 2026)
Local Trail Association
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Stats
-
Distance25 miles
-
Avg time6 hr 27 min
-
Altitude min1,133 ft
-
Altitude start1,164 ft
-
Altitude end1,217 ft
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Climb1 mile
-
Descent-5,674 ft
-
Grade max-80.8%
-
Grade min67.1%
-
Distance climb14 miles
-
Distance down11 miles
-
Distance flat5,043 ft
69 Reviews & Comments
dantepetri1
Highly recommend. Trail bike with solid trail tires should be great. This descent should be in the top 10 list for the west coast imo
BigMeech
Great ride. I did it all except for Chutes on an XC bike. Chutes is a legit double-black trail. The middle two trails: Middle Sam Merrill and Sunset Ridge are riding best now, and were empty. El Prieto is a bit blown out and there were a bunch of hikers. (11/26/2021)
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Trails in Route
| 1 mile | |||||
| 3 miles | |||||
| 1 mile | |||||
| 4,672 ft | |||||
| 3,510 ft | |||||
| 5 miles | |||||
| 3 miles | |||||
| 1 mile | |||||
| 1,017 ft | |||||
| 476 ft | |||||
| 518 ft | |||||
| 2 miles | |||||
| 3,530 ft | |||||
| 220 ft | |||||
| 2 miles | |||||
| 1,198 ft | |||||
| 3,510 ft | |||||
| 4,672 ft | |||||
| 1,404 ft | |||||
| 2 miles | |||||
| 1,178 ft |
Details
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Riding area
-
Primary ActivityMountain Bike
-
Difficulty ratingDouble Black Diamond
-
Route TypeLoop
-
Bike typeAM
-
Activity Logs
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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.
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- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches
US Cell Coverage
Legend
Radar Time
Activity Recordings
Trailforks uses anonymized public activity data.
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Activity Recordings
Trailforks uses anonymized public activity data.
?
Winter Trails
Warning
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
Trails are shown in grey.
Only show trails with no bike usage.
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- Unpaved
- Paved
Photos
Videos
mtb
Sunset ridge trail | black diamond | Altadena
trail: Sunset Ridge
9:29 | 5 | comments: 0 | favs:
Nov 11, 2026
mtb
I Came for El Prieto, But Sunset Ridge Stole the Show
trail: El Prieto Trail
15:27 | 9 | comments: 0 | favs:
Nov 7, 2026
Recent Trail Reports Along Route
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- By collinellis198 & contributors
- #25121 - 1,858 views
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