1 miles
Distance
29 ft
Climb
-213 ft
Descent
00:08:50
Avg time

Tunnel 4 Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Hike
    • Trail Running
  • Riding Area
    Los Peñasquitos Canyon
    San Diego, California
  • Difficulty Rating
  • Voted Difficulty
    Blue (2 votes)
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC, Fat, Adaptive MTB
  • Trail Usage
    Multi-use
  • Direction
    Downhill Only
  • Climb Difficulty
    Blue
  • Physical Rating
    Moderate
  • Trail Visibility
    Always easy to follow
  • Family Friendly
    Yes
  • Dogs Allowed
    Yes
  • eBike Allowed
  • Global Ranking
    #8645 in Mountain Biking
  • Local Popularity
    100 in Mountain Biking [+]
    • 100 in E-Biking
    • 75 in Trail Running
    • 80 in Hiking

One of the few surviving tunnel trails. It gets its name from the way it swoops through dense scrub oak.

Downhill only.

Adaptive Bike Info
aMTB 2 Rating: Obstacles exist. You may or may not be able to ride this solo. Support rider recommended.

This trail can be very precarious in sections. Please exercise caution. Advanced riders only. There is one unmarked ride-around that concerned preservationists keep blocking until we can get signage up. Be sure to take East Deer Canyon for exit. Tunnel 1 is mostly impassable for aMTB

Local Trail Association
More Stats for Tunnel 4 mountain bike trail
  • Altitude change
    -184 ft
  • Altitude min
    239 ft
  • Altitude max
    438 ft
  • Altitude start
    438 ft
  • Altitude end
    254 ft
  • Grade
    -3.46%
  • Grade max
    -19.836%
  • Grade min
    8.847%
  • Distance climb
    1,082 ft
  • Distance down
    3,385 ft
  • Distance flat
    862 ft
  • Avg time
    00:08:50
  • Avg reverse time
    00:13:24
  • view trail stats
Status:
on May 25, 2020
Dry
Avg: 4.5 (10 votes)

view (4,871)
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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
Trailforks scans users ridelogs 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 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
ContributeDetails
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

LEGEND
Trail Difficulties
  • Access Road/Trail
  • White
  • Green
  • Blue
  • Black
  • Double Black Diamond

Trail Report Status
  • Clear / Green
  • Minor Issue / Yellow
  • Significant Issue / Amber
  • Closed

  • Land Owner Overlay
  • Wilderness (typically no bikes in USA)
  • BLM (public)
  • USFS (Wildlife sanctuaries darker than usfs)
  • State land
  • Indigenous
  • Military
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
  • Map Markers
  • trail Trail Head
  • photo Photo
  • place Directory Listing
  • region Riding Area
  • TTF TTF
  • Parking Parking
  • Viewpoint Viewpoint
  • Information Information
  • Warning Warning
  • Directions Directions
  • Sight Sight
  • Restrooms Restrooms
  • eBike Charging Point eBike Charging Point
  • Water Fountain/Source Water Fountain/Source
  • Gate Gate
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Ladder Ladder
  • Stairs Stairs
  • Bridge Bridge
  • Camping Camping
  • Cabin Cabin
  • Lodge Lodge
  • Bear Cache Bear Cache
  • Dock Dock
  • Ranger Station Ranger Station
  • Summit Summit
  • Other Other
      Directions to tunnel-4 trailhead (32.945430, -117.164210)
      update trails status or condition

      Tunnel 4 Trail Reports

      Recent Ridelog Activity on Trail

      Past Week
      • 53 rides
      • 17 miles avg distance
      6 Months
      • 539 rides
      • 15 miles avg distance
      All
      • 2,829 rides
      •  

      Photos

      more »
      37 |
      Mar 26, 2020 @ 8:27pm
      Mar 26, 2020
      | 1 comments
      29 |
      Dec 23, 2019 @ 11:19pm
      Dec 23, 2019
      88 |
      Jul 30, 2019 @ 3:48pm
      Jul 30, 2019
      112 |
      Jul 30, 2019 @ 3:47pm
      Jul 30, 2019

      Routes with this trail

      more »
      titleratingdistance
      Los Penasquitos Canyon Loop aMTB-2
      12 miles
      Los Penasquitos and Del Mar Mesa Intro Tour
      23 miles
      Tunnels and Ocean Air Loop
      17 miles
      PQ Canyon to Black Mountain
      9 miles

      4 Reviews & Comments

      • + 1
      flag anthonydiaz (Jul 18, 2018 at 12:47)
       fun trail. just watch for the loose rocks at the beginning. after that its smooth sailing.
      [Reply]
      • + 2
      flag OBkook (Oct 3, 2019 at 19:33)
       Fun trail! Wear eye protection. I ran into a small low hanging branch, had I not been wearing glasses I may have suffered an eye injury.
      [Reply]
      • + 1
      flag ewikpark (Mar 14, 2020 at 19:59)
       Fallen tree is still not cleared, I don't know if I have permission to clear it. Also there is a low lying branch in one of the downhill sections that almost got me. Be wary of that when you go down
      [Reply]
      • + 1
      flag budgetmtb (13 hours ago)
       New one way only sign posted at the top.
      [Reply]

      Post a Comment



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