29.5 miles
Distance
3,126 ft
Climb
-3,094 ft
Descent
1,010 ft
High Point
32 ft
Altitude change
23 ft
Altitude min
25 ft
Altitude start
56 ft
Altitude end
-57.4%
Grade max
61.3%
Grade min
13 miles
Distance climb
12 miles
Distance down
5 miles
Distance flat

Starts at Big River parking lot and makes a big loop with about half single track and half dirt road with a short section of paved road.

Detailed Description
Big River Big Loop is a 30 mile popular intermediate route located near Mendocino California. This mountain bike only route can be used both directions and has a moderate overall physical rating. This route includes 45 trails. This route climbs 3,126 ft with a max elevation of 1,010 ft then descends -3,094 ft.

Trail Issues on Route

  • Minor Issue / Yellow: 1 trail (newest: Sep 18, 2025)
Local Trail Association
Please consider joining or donating to the local riding association to support trail development & maintenance.
Donate to earn trail karma!

Stats

  • Distance
    30 miles
  • Avg time
    9 hr 39 min
  • Altitude min
    23 ft
  • Altitude start
    25 ft
  • Altitude end
    56 ft
  • Climb
    3,126 ft
  • Descent
    -3,094 ft
  • Grade max
    -57.4%
  • Grade min
    61.3%
  • Distance climb
    13 miles
  • Distance down
    12 miles
  • Distance flat
    5 miles

39 Reviews & Comments


We hope you've been enjoying Trailforks!

Create a FREE account to view route comments and much more.

Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Difficulty rating
    Blue
  • Route Type
    Loop
  • Direction
    Both Directions
  • Physical rating
    Moderate
  • Activity Logs
    2
Avg: 4.5 (2 votes)
close
3D
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Flow (Ridden Direction)
Trailforks scans users activity logs 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 users are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
  • bi-directional trail
  • no data
Trail Last Ridden
Trailforks scans activity logs 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 activity logs 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 activities = more kinetic energy = warmer colors.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches
US Cell Coverage
Legend
cell carrier legend

Radar Time
Activity Recordings
Trailforks uses anonymized public activity data. ?
Activity Recordings
Trailforks uses anonymized public activity data. ?
Winter Trails
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
BC Backroad Status

Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.

map legend
Slope Aspect
Direction the slope faces
Flat N NE E SE S SW W NW
Trails Deemphasized
Trails are shown in grey.
disable
Only show trails with no bike usage.
Enable
Suggested Layers
Based on selected activity type

    Save the current map location and zoom level as your default home location whenever this page is loaded.

    Save
    Trail transparency
    • Singletrack
    • Unpaved
    mtb
    64
    mtb
    trail: Gunslinger
    135
    mtb
    97 | 1 faves
    mtb
    trail: E-Z Out
    56
    Lindquist Loops- Jackson Demonstration State...
    mtb
    Lindquist Loops- Jackson Demonstration State Forest
    6:33 | 138 | comments: 0 | favs:
    Oct 31, 2024
    Confusion Trail 2- Jackson Demonstration State...
    mtb
    Confusion Trail 2- Jackson Demonstration State Forest
    trail: Confusion
    2:39 | 142 | comments: 0 | favs:
    Oct 25, 2024

    Recent Trail Reports Along Route

    statustraildateconditiondescription
    E-Z Out
    Jun 30, 2026 @ 12:35pm (America/Los_Angeles)
    Jun 30, 2026
    A new metal bridge has been added at the creek at the bottom. The old trail has been blocked off where the old stream crossing was.
    Lindquist Loops
    Jun 23, 2026 @ 11:31am (America/Los_Angeles)
    Jun 23, 2026
    Big River Haul Road
    May 11, 2026 @ 2:30pm (America/Los_Angeles)
    May 11, 2026
    Wagon Trail Cutoff
    Apr 19, 2026 @ 11:03am (America/Los_Angeles)
    Apr 19, 2026
    Gas Cap Entrance
    Apr 19, 2026 @ 11:03am (America/Los_Angeles)
    Apr 19, 2026
    more reports »
    • By JackCoulTF Pro & contributors
    • #6250 - 3,883 views

    Hit the Trail

    Open in App

    Get this route on your phone instantly.

    Download Route

    Save to wishlist, Garmin & download.