1.5 miles
Distance
17 ft
Climb
-1,151 ft
Descent
00:23:20
Avg time

Undertow Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Hike
    • Trail Running
  • Riding Area
    Simi Valley
    , California
  • Difficulty Rating
  • Voted Difficulty
    Double Black Diamond (4 votes)
  • Trail Type
    Singletrack
  • Bike Type
    DH
  • Direction
    Downhill Primary
    Popular direction shown
  • Dogs Allowed
    Yes
  • eBike Allowed
    Yes up to Class 1
  • TTFs on Trail
    Drop, Jump, Rock Face, Rock Garden
  • Global Ranking
    #8189 in Mountain Biking [+]
    • #906 in E-Biking
    • #78092 in Trail Running
  • Local Popularity
    100 in Mountain Biking [+]
    • 5 in Trail Running
    • 5 in Hiking

One of three trails descending westward off the Rocky Peak Trail, Undertow offers many rock rolls, step-ups, and step-downs. It is more technically challenging than the adjacent trail Hummingbird.

This trail is unsanctioned.

Traditionally Indigenous Territory
More Stats for Undertow mountain bike trail trail
  • Altitude change
    -1,135 ft
  • Altitude min
    1,139 ft
  • Altitude max
    2,276 ft
  • Altitude start
    2,273 ft
  • Altitude end
    1,138 ft
  • Grade
    -14.3%
  • Grade max
    -94.6%
  • Grade min
    9.3%
  • Distance climb
    364 ft
  • Distance down
    1 mile
  • Distance flat
    164 ft
  • Avg time
    00:23:20
  • Avg reverse time
    00:53:19
  • view trail stats
Status:
on Sep 1, 2021
Very Dry
Avg: 4.9 (10 votes)

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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Ridden Direction
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
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
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
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      Directions to undertow-150409 trailhead (34.284160, -118.637850)
      update trails status or condition

      Undertow Trail Reports

      statusdatedescription
      Sep 1, 2021 @ 9:58am
      Sep 1, 2021
      Aug 3, 2021 @ 7:16am
      Aug 3, 2021
      Dry, rutted, and loose
      May 5, 2021 @ 1:40am
      May 5, 2021
      Apr 23, 2021 @ 11:31am
      Apr 23, 2021
      A little loose in some sections, but overall in good shape.
      Mar 22, 2021 @ 4:57pm
      Mar 22, 2021
      Somebody asked me about the swings.
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 5 rides
      • 7 miles avg distance
      6 Months
      • 99 rides
      • 11 miles avg distance
      All
      • 633 rides
      •  

      Photos

      more »
      33 |
      Apr 23, 2021 @ 11:33am
      Apr 23, 2021
      38 |
      Mar 14, 2021 @ 7:28am
      Mar 14, 2021
      52 |
      Mar 14, 2021 @ 7:27am
      Mar 14, 2021
      70 |
      Mar 14, 2021 @ 7:27am
      Mar 14, 2021

      Trail Lists

      Routes with this trail

      titleratingdistance
      Rocky peak enduro sampler
      13 miles
      Chumash-RockyPeak-Undertow
      10 miles
      Rocky Peak to Undertow
      3 miles

      6 Reviews & Comments

      • - 2
      dynamatt (Jan 13, 2019 at 19:34)
       Next level conditions, loads of traction, trail drains well
      [Reply]
      • + 0
      dantepetri1 (Oct 27, 2019 at 18:01)
       Super fun trail, little bit of everything and great hard pack traction
      [Reply]
      • + 0
      Stlc (Jan 7, 2021 at 10:29)
       Of the three main trails Undertow is the most difficult. Then the Grudge and Hummingbird is last on the list...
      [Reply]
      • + 0
      blindstuff (Sep 20, 2021 at 10:53)
       By far the hardest of the three trails off rocky peak road. A few rock rolls on this one are quite technically challenge, definitely not let go and hang on like you can do on some on the grudge. If you're an advanced rider and want a challenge this is it, unless you're really good it'll take a couple of rides through to clean the trail top to bottom
      [Reply]
      • + 0
      Marcpelosi (Sep 21, 2021 at 12:54)
       I would definitely rate this a double black. Has some ride arounds but a couple features makes this a double black. Best trail I’ve ridden in LA so far for downhill/enduro
      [Reply]
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      Videos

      more »
      Undertow - Rocky Peak Simi Valley Part 1
      13:23 | 10 | Oct 14, 2021 , Simi Valley
      ROCKY PEAK/ UNDERTOW Trail-Simi Valley
      10:32 | 134 | May 1, 2021 , Simi Valley
      Rocky Peak MTB
      13:08 | 178 | Jan 11, 2021 , Simi Valley
      Undertow PR | Rocky Peak MTB 4K
      6:03 | 350 | Sep 25, 2020 , Simi Valley

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