27.2 miles
3,980 ft
-3,976 ft
2,058 ft
High Point

Good ride from the coast to Big Basin and Back. As always, heading down Middle Ridge is easier than going up.

Detailed Description
Chalks_Big-Basin_Loop is a 27 mile less popular extreme route located near Big Basin State Park California. This mountain bike primary route can be used both directions and has a moderate overall physical rating. This route includes 10 trails. This route climbs 3,980 ft with a max elevation of 2,058 ft then descends -3,976 ft.
Local Trail Association
Local trail association
Santa Cruz Mountains Trail Stewardship (santacruztrails.org)
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Trail Products

1 Review & Comments

  • + 2
naba (Jun 30, 2019 at 21:11)
Descending this fire road is easy if you go fast: it turns into a roller coaster when you are bombing it. If you do not go that fast or you're not that strong, you may have to hike a few steep hills (a couple of meters), but any black diamond rating is over-statement both technical and effort-wise. Going downhill is an easy to moderate ride (green-blue).


  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • Hike
    • Trail Running
  • Difficulty rating
    Double Black Diamond
  • Route Type
  • Bike type
  • Direction
    Both Directions
  • Physical rating
More Stats for Chalks_Big-Basin_Loop mountain bike route
  • Altitude min
    158 ft
  • Altitude start
    158 ft
  • Altitude end
    161 ft
  • Grade max
  • Grade min
  • Distance climb
    13 miles
  • Distance down
    13 miles
  • Distance flat
    1 mile
Avg: 3 (1 votes)
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Inadequate
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Flow (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%
  • bi-directional trail
  • no data
Trail Last Ridden
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  • < 2 days
  • < 1 week
  • < 2 weeks
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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
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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.
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  • popular
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Radar Time
x 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
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Big Basin Mountain Biking
Big Basin Mountain Biking
6:19 | 553 | comments: 0 | favs:
Mar 9, 2019

Recent Trail Reports Along Route

Gazos Creek Road
Oct 3, 2022 @ 7:45am
Oct 3, 2022
The road is open and in good condition. Nice way to survey the forest’s recovery from wildfire.
Johansen Road
Jul 15, 2017 @ 11:07am
Jul 15, 2017
Fire road as bikes aren't allowed on trails within the park. Get ready to climb!! Steep and short climbs with lose dirt, almost sand. Beautiful scenery though! ! Bring lots of water if riding in the Summer. Enjoy!!
more reports »
  • By aguasonic & contributors
  • #14590 - 727 views