1 mile
Distance
27 ft
Climb
-607 ft
Descent
00:07:48
Avg time

Grizzly Flat South Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Castle Rock State Park
    Los Altos Hills, California
  • Difficulty Rating
  • Trail Type
    Mixed
  • Trail Usage
    Multi-use
  • Direction
    Both Directions
    Popular direction shown
  • Climb Difficulty
    Black Diamond
  • Trail Visibility
    Always easy to follow
  • eBike Allowed
  • Local Popularity
    100 in Mountain Biking [+]
    • 100 in Trail Running
    • 100 in Hiking

Recommended downhill only. Fireroad that has grown into singletrack, can be a bit more fun than Grizzly Flat North. Gravel bikes would prefer Grizzly Flat North.

Traditionally Indigenous Territory
More Stats for Grizzly Flat South mountain bike trail trail
  • Altitude change
    -581 ft
  • Altitude min
    1,703 ft
  • Altitude max
    2,310 ft
  • Altitude start
    2,310 ft
  • Altitude end
    1,729 ft
  • Grade
    -11%
  • Grade max
    -41.1%
  • Grade min
    16.4%
  • Distance climb
    400 ft
  • Distance down
    4,895 ft
  • Avg time
    00:07:48
  • Avg reverse time
    00:24:36
  • view trail stats
Status:
on Apr 12, 2021
Dry
Avg: 4 (1 votes)

view (198)
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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
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
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
  • Boardwalk Boardwalk
  • Camping Camping
  • Cabin Cabin
  • Lodge Lodge
  • Bear Cache Bear Cache
  • Dock Dock
  • Ranger Station Ranger Station
  • Summit Summit
  • Other Other
      Directions to grizzly-flat-south trailhead (37.290680, -122.154450)
      update trails status or condition

      Grizzly Flat South Trail Reports

      statusdatedescription
      Apr 12, 2021 @ 4:34pm
      Apr 12, 2021
      Sep 23, 2020 @ 7:41pm
      Sep 23, 2020
      The tree is gone
      Sep 19, 2020 @ 7:31pm
      Sep 19, 2020
      No trees down on the south fork of the trail. There is one small one on the main trail near the creek crossing, but it can be biked over without...
      Jun 8, 2020 @ 10:52am
      Jun 8, 2020
      Two trees down on Grizzly Flat South, requiring dismount and carry over.
      May 17, 2020 @ 1:36pm
      May 17, 2020
      Definitely more fun to descend on Grizzly Flat South rather than Grizzly Flat North. Just have to be wary of hikers in the blind corners. Climbing...
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 4 rides
      • 18 miles avg distance
      6 Months
      • 26 rides
      • 18 miles avg distance
      All
      • 154 rides
      •  

      Photos

      no photos have been added for Grizzly Flat South yet, add a photo.

      Routes with this trail

      titleratingdistance
      Canyon Rd Long Ridge loop
      11 miles

      Trail Products

      Reviews / Comments

      No reviews yet, be the first to write a review or ask a question.
      Use trail reports to comment on trail conditions.


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