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Trail Flow (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%
  • bi-directional trail
  • no data
Trail Last Ridden
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Trail Ridden Direction
The intended direction a trail should be ridden.
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  • Uphill Primary
  • Uphill Only
  • One Direction
Contribute Details
Colors indicate trail is missing specified detail.
  • Description
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  • Description & Photos
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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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Missing Trails
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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 riders 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.

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Slope Aspect
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        Fullerton is a city located in northern Orange County, California, United States. As of the 2010 census, the city had a total population of 135,161.[6] ...wikipedia
        Activities Click to view
        Region Details
        • 4
        • 5
        • 1

        Region Status
        Caution as of May 31, 2026
        Local Trail Association

        Stats

        Avg Trail Rating
        Trails (view details)
        10
        Trails Mountain Bike
        10
        Trails E-Bike
        2
        Trails Hike
        10
        Trails Trail Running
        10
        Trails Nordic Ski
        1
        Total Distance
        5 miles
        Total Descent Distance
        2 miles
        Total Descent
        163 ft
        Total Vertical
        263 ft
        Highest Trailhead
        304 ft
        Reports
        62
        Photos
        4
        Ridden Counter
        13,637
        Sub Regions

        Popular Fullerton Mountain Biking Trails

        100 2.0 5,116 ft 200 ft 1,190
        Popular green difficulty mixed. This mountain bike primary trail can be used both directions and has a moderate overall physical rating with a 200 ft green climb. On average it takes 8 minutes to complete this trail.
        95 3.0 3,613 ft 118 ft 1,155
        Popular blue difficulty mixed. This mountain bike primary trail can be used downhill primary and has a moderate overall physical rating with a 118 ft blue climb. On average it takes 5 minutes to complete this trail.
        95 2.4 3,310 ft 45 ft 1,128
        Popular blue difficulty mixed. This mountain bike primary trail and has a moderate overall physical rating with a 45 ft green climb. On average it takes 5 minutes to complete this trail.
        85 2.5 1 mile 280 ft 1,045
        Trail Head starts from Rosecrans Ave next to Fire station #6. Trail is mixed use Hiking, Biking and .
        90 3.4 2,562 ft 23 ft 1,020
        Popular blue difficulty doubletrack. This mountain bike primary trail can be used downhill primary and has a moderate overall physical rating with a 23 ft green climb. On average it takes 2 minutes to complete this trail.
        80 1.5 2,772 ft 70 ft 617
        Popular blue difficulty mixed. This mountain bike primary trail can be used both directions and has a moderate overall physical rating with a 70 ft blue climb. On average it takes 4 minutes to complete this trail.
        60 2.5 1 mile 60 ft 513
        Moderately popular white difficulty family friendly gravel path. This mountain bike primary trail can be used both directions and has a easy overall physical rating with a 60 ft green climb. On average it takes 2 hours31 minutes to complete this trail.
        40 3.4 5,108 ft 13 ft 312
        Trail connecting Courthouse to Laguna Lake, north segment of Bastanchury to Hermosa.

        Recent Ride Log Activity in Region

        Today
        • 0 rides
        Yesterday
        • 11 rides
        Past Week
        • 45 rides

        Fullerton Mountain Bike Routes

        5.0 15 miles 1,301 ft 18
        Fullerton Loop - Full....
        11 miles 894 ft 12 Loop
        The Fullerton Loop is a great place to learn and become comfortable on your bike. It has some concrete...
        7 miles 403 ft 6
        Fullerton Loop for Beginner

        Photos of Fullerton Mountain Bike

        9 |
        Jun 19, 2026 @ 10:54pm
        Jun 19, 2026
        7 |
        Jun 18, 2026 @ 11:13am
        Jun 18, 2026
        9 |
        Jun 17, 2026 @ 3:46pm
        Jun 17, 2026
        91 |
        Dec 4, 2025 @ 5:04pm
        Dec 4, 2025
        107 |
        Apr 16, 2024 @ 10:45am
        Apr 16, 2024
        108 |
        Apr 16, 2024 @ 10:42am
        Apr 16, 2024
        113 |
        Dec 6, 2023 @ 5:38pm
        Dec 6, 2023
        155 |
        Sep 27, 2022 @ 9:48am
        Sep 27, 2022
        200 |
        Feb 8, 2021 @ 10:31pm
        Feb 8, 2021
        259 |
        Jan 28, 2021 @ 8:29am
        Jan 28, 2021
        250 |
        Jan 28, 2021 @ 8:29am
        Jan 28, 2021
        200 |
        Jan 28, 2021 @ 8:29am
        Jan 28, 2021

        Videos of Fullerton Mountain Bike

        Learn to Ride a Mountain Bike Here: Fullerton, CA
        17:30 | 2 | Jun 10, 2026 , Fullerton
        Fullerton Loop - Fast Sections

        16:37 | 62 | Aug 21, 2025
        Fullerton Loop

        1:0:40 | 48 | Aug 21, 2025
        Fullerton loop is the best beginner mountain...
        2:08 | 130 | Jun 29, 2025 , Fullerton
        Fullerton Loop Night Ride
        9:24 | 1030 | Mar 3, 2019 , Fullerton

        Recent Trail Reports

        Activity Feed

        usernameactiontypetitledate
        Louiseowishlistrouteactivity #97562882
        Jun 22, 2026 @ 8:15am
        Jun 22, 2026
        2oWA0Iaddphotoactivity #97367499
        Jun 19, 2026 @ 10:54pm
        Jun 19, 2026
        2oWA0Iaddphotoactivity #97264474
        Jun 18, 2026 @ 11:13am
        Jun 18, 2026
        2oWA0Iaddphotoactivity #97213741
        Jun 17, 2026 @ 3:46pm
        Jun 17, 2026
        2oWA0Icommenttrailactivity #97207036
        Jun 17, 2026 @ 1:36pm
        Jun 17, 2026

        Recent Comments

        usernametypetitlecommentdate
        2oWA0ItrailPsychoThis trail is so gnarly I crashed badly on the...
        Jun 17, 2026 @ 1:36pm
        Jun 17, 2026
        AlanquesttrailCastlewood TrailArguably the most amount of actual climbing on...
        Dec 21, 2025 @ 10:04pm
        Dec 21, 2025
        AlanquesttrailParks Road TrailPretty easy long stretch of single track, can...
        Dec 21, 2025 @ 9:54pm
        Dec 21, 2025
        AlanquesttrailBrea Dam TrailOne of the most fun segments of The Fullerton...
        Dec 21, 2025 @ 9:44pm
        Dec 21, 2025
        strmfshr57trailNora Kuttner TrailFast DH. A couple of ruts at the top. 2 RR...
        Apr 23, 2025 @ 5:18pm
        Apr 23, 2025

        Local Badges


        Activity Type Stats

        activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
        Mountain Bike105 miles164 ft2 miles262 ft
        #5,633#1,89346220,187
        E-Bike24 miles39 ft1 mile200 ft
        612,478
        Hike105 miles164 ft2 miles262 ft
        #12,202#4,38062238
        Trail Running105 miles164 ft2 miles262 ft
        #11,254#3,89762385
        Nordic Ski13,333 ft49 ft2,060 ft52 ft

        Frequently Asked Questions About Fullerton

        What are the highest rated mountain biking trails in Fullerton?
        The highest rated mountain biking trails in Fullerton are: View all mountain biking trails sorted by rating.
        What is the best time of the year to ride in Fullerton?
        Based on ride log data, the most popular months to ride in Fullerton are:
        • May (137 activities)
        • July (127 activities)
        • June (120 activities)
        Check the Fullerton reports page for current trail conditions, recent trail reports, and seasonal information from the local community.
        Where can I park to ride in Fullerton?
        Check the Fullerton trail map for trailhead and parking information. Community members regularly update access and parking details for trails in the area.
        What is the longest trail in Fullerton?
        The longest trail in Fullerton is Coyote Creek Bikeway at 2.7 miles. View all trails sorted by distance.
        • By brenthillierTF Pro NSMBA TRAILFORKS & contributors
        • Admins: OCMTBA
        • #14570 - 5,585 views

        Downloading of trail gps tracks in kml & gpx formats is enabled for Fullerton.
        You must login to download files.