60.1 miles
8,799 ft
-8,790 ft
2 miles
High Point

This the route for the 2018 Big Bear Grizzly 100km Race and MTB Gran Fondo. This race will be the series finale in the National Ultra Endurance race series.

Detailed Description
2018 Big Bear Grizzly 100km is a 60 mile less popular intermediate race route located near Big Bear California. This mountain bike only route can be used one direction and has a hard overall physical rating. This route includes 12 trails. This route climbs 8,799 ft with a max elevation of 8,098 ft then descends -8,790 ft.
Local Trail Association
Local trail association
Big Bear Valley Trails Foundation (trailsfoundation.org)
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15 Reviews & Comments

  • + 0
elephant33 (Aug 3, 2022 at 7:07)
Pretty fun and darn beautiful trail! Great in both direction!
  • + 0
kimmypoohx3 (Apr 24, 2022 at 15:53)
Exposed at the top and I know this tree \/ lol it does exactly that not saying this from experience or anything
  • + 1
SanClementePat (Nov 2, 2021 at 20:08)
eBikes are allowed on most USFS roads including Knickerbocker Road 2N08. I was on 2N08 today and there are no "ebikes not allowed signs" See excerpt from USFS below. Please correct the ebike allowed (NO) in this trail description to (YES)


Electric Bicycles:

Electric bicycles are growing in popularity and offer increased potential for quality recreation experiences, where determined appropriate, that connect people with enjoyment of their National Forests.

Electric bicycles are allowed on roads and trails open to all vehicles, 50 inch OHV and motorcycle only routes. www.fs.usda.gov/activity/sbnf/recreation/ohv
Electric bicycles (including pedal assist) are not permitted on non-motorized trails.
  • + 1
MTBMOR (Jul 26, 2020 at 13:53)
Great trail with lots of optional features to really spice up the trail.
  • + 0
DigginTrails (Jul 18, 2020 at 20:24)
Trail Plumbers
Fun downhill, pretty cruisy, not to technical
  • + 1
JPOG1919 (Jun 29, 2020 at 17:19)
This is an awesome trail. Exposed at times but ridable for sure. Great condition and a lot of fun to ride. Do ride with caution and pay attention. Have fun!
  • + 2
MTBMOR (Jun 22, 2020 at 8:39)
Trail Plumbers
It is a good trail to climb too...I agree on it being a blue trail and an easier one at that. Like most of the trails in the area it is long so people need to remember to take breaks and enjoy themselves.
  • + 1
Nickydre (Oct 27, 2019 at 15:26)
One of the most incredible trails in big bear, it’s like a roller coaster. The turns are so sweet and well made. Incredible flow, premium traction in the super dry conditions.
  • + 1
BenLow2019 (Oct 17, 2019 at 8:54)
Trail Seven Oaks
This trail starts mellow and quickly gets SPORTY. Expect steep and expect LOOSE. In some spots the trail is narrowest possible bench cut into the side of the slope. It's best ridden downhill and I don't think even the strongest riders could power up this trail the whole way due to the incredible loose, sandy conditions in big sections. Fun coming down!
  • + 0
Johnmoonbright (Sep 29, 2019 at 15:46)
Trail is clear of trees and rideable. Certain gnarled trees like to grab handlebars and send you OTB over the cliff, exercise extreme caution.
  • + 0
Psschmitt1 (Jul 5, 2019 at 9:04)
Best ridden west to east IMO to avoid some tough climbs from the east trailhead at 2N10/17. Nice flow, hard pack, fun trail.
  • + 0
Psschmitt1 (Jul 5, 2019 at 8:58)
Great XC trail ridden in either direction. A few fun rock sections. East end connects through Boulder Camp road. A fun, well-maintained piece of classic Big Bear single-track riding with some peek lake views.
  • + 1
kJShreds (Jun 9, 2019 at 19:36)
Trail Plumbers
This is now called Skyline East and is a blue XC trail
  • + 1
wildmeff (Oct 9, 2019 at 19:33)
Trail Plumbers
correct, thanks! descended it, seems like it would be a good climb to get to Fall Line.
  • + 1
juice-stain (Aug 6, 2017 at 21:36)
Elevation and full route are a bit off here. See MTB Proj. I did the full Skyline, which is 15 miles one-way and somewhere around 1,750'. The out-and-back from the Club View Drive lower trailhead totaled 30.2 miles, including the tiny Grand View Overlook spur. Total elevation gain was 3,652'.

Route Sections

1 Timed Section


  • Race Course
  • Riding area
  • Primary Activity
    Mountain Bike
  • AKA
    Grizzly 100k
  • Difficulty rating
  • Route Type
  • Bike type
    AM, XC
  • Direction
    One Direction
  • Physical rating
  • Ridelogs
More Stats for 2018 Big Bear Grizzly 100km mountain bike route
  • Altitude min
    4,783 ft
  • Altitude start
    6,801 ft
  • Altitude end
    6,811 ft
  • Grade max
  • Grade min
  • Distance climb
    29 miles
  • Distance down
    26 miles
  • Distance flat
    5 miles
Avg: 5 (1 votes)

  • view (1)
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Inadequate
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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x Activity Recordings
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  • moto (1 year)
Activity Recordings
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Recent Trail Reports Along Route

Knickerbocker Road (2N08)
Sep 22, 2022 @ 6:06am
Sep 22, 2022
Trail opened. New fire order 05-12-52-22-08 in effect does not impact this trail.
Cabin 89 Trail
Sep 22, 2022 @ 6:05am
Sep 22, 2022
Trail opened. New fire order 05-12-52-22-08 in effect does not impact this trail.
Knickerbocker Connect
Sep 22, 2022 @ 6:05am
Sep 22, 2022
Trail opened. New fire order 05-12-52-22-08 in effect does not impact this trail.
Frontline Road
Sep 22, 2022 @ 6:03am
Sep 22, 2022
Trail opened. New fire order 05-12-52-22-08 in effect does not impact this trail.
Skyline Trail
Sep 22, 2022 @ 6:02am
Sep 22, 2022
Trail not completely opened. New fire order 05-12-52-22-08 in effect does impact this trail.
more reports »
  • By socalstokie & contributors
  • #7741 - 1,501 views