17 miles
Distance
1,880 ft
Climb
-1,881 ft
Descent
439 ft
High Point

A customizable, base-idea loop that includes Tunnel 4, Deer canyon, Ocean Air/Carmel Mt and PQ canyon. Mostly easy trails, but beginners may need to walk a few steep sections and obstacles, or change the route a little.

Typically ridden counter clockwise to descend a couple steeper trails, but could also be ridden clockwise, maybe with some route changes, to use less steep climbs.

Customize the route with other trails like ride Switchbacks or Eucalyptus instead of Tunnel 4, or add Tunnel 1. Use the easy del Mar Mesa Road bypass instead of steeper Palacio Drop. Return to PQ canyon using Side Hill or Cobbles instead of Waimea. Or go further west to hit Return of the Crabs.

Local Trail Association
San Diego Mountain Biking Association (sdmba.com)
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Details

  • Riding area
  • Difficulty rating
    Green
  • Route Type
    Loop
  • Bike type
    AM, XC, CX, Gravel
  • Direction
    One Direction
  • Physical rating
    Moderate
More Stats for Tunnels and Ocean Air Loop mountain bike route
  • Altitude min
    59 ft
  • Altitude start
    237 ft
  • Altitude end
    237 ft
  • Grade max
    -36.244%
  • Grade min
    30.013%
  • Distance climb
    8 miles
  • Distance down
    7 miles
  • Distance flat
    2 miles
Avg: 5 (1 votes)
close
Trail Conditions
  • Unknown
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
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 or Major Issue / Red

  • 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 Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • 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
  • Water Fountain/Source Water Fountain/Source
  • Sight Sight
  • Restrooms Restrooms
  • Gate Gate
  • Camping Camping
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Other Other
Trail transparency
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Dec 16, 2018
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Learning to go fast
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Dec 3, 2018
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Tunnels #4 singletrack | PQ Trail, San Diego...
Tunnels #4 singletrack | PQ Trail, San Diego MTB POV
trail: Tunnel 4
4:33 | 130 | comments: 0 | favs:
Jun 29, 2018

Recent Trail Reports Along Route

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more reports »
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