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  • Freeze/thaw Cycle
  • Icy
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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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  • < 2 days
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Trail Ridden Direction
The intended direction a trail should be ridden.
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  • Uphill Only
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Contribute Details
Colors indicate trail is missing specified detail.
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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
Direction the slope faces
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        No description for San Dimas has been added yet! Login or register to submit one.
        Activities Click to view
        Region Details
        • 2
        • 9
        • 20
        • 1
        • 1

        Region Status
        Caution as of May 17, 2026
        Local Trail Association

        Stats

        Avg Trail Rating
        Trails (view details)
        33
        Trails Mountain Bike
        35
        Trails E-Bike
        9
        Trails Horse
        2
        Trails Hike
        35
        Trails Trail Running
        35
        Total Distance
        19 miles
        Total Descent
        3,850 ft
        Total Vertical
        2,953 ft
        Highest Trailhead
        3,528 ft
        Reports
        286
        Photos
        98
        Ridden Counter
        11,097
        Sub Regions

        Popular San Dimas Mountain Biking Trails

        95 3.4 2 miles 300 ft 466
        Popular green difficulty singletrack. This mountain bike primary trail can be used both directions and has a easy overall physical rating with a 300 ft green climb. On average it takes 16 minutes to complete this trail.
        80 3.5 2,771 ft 127 ft 373
        Ride around the stables and back up to the top of the hill. Get ready for a bumpy ride down the .
        75 4.2 3,101 ft 9 ft 359
        Highly rated popular blue difficulty singletrack. This mountain bike primary trail can be used downhill primary. It features rock garden. On average it takes 3 minutes to complete this trail.
        57
        75 3.3 1 mile 215 ft 358
        Super wide and smooth trail for rolling easy descent.
        95 3.8 1,147 ft 21 ft 349
        Popular blue difficulty singletrack. This mountain bike primary trail can be used both directions. On average it takes 1 minutes to complete this trail.
        70 3.9 1,917 ft 4 ft 280
        Popular blue difficulty singletrack. This mountain bike primary trail can be used both directions and has a moderate overall physical rating with a 4 ft black diamond climb. On average it takes 2 minutes to complete this trail.
        75 4.4 938 ft 17 ft 279
        Fun twisty downhill singletrack through a shady stand of trees.
        55 3.8 3,240 ft 119 ft 266
        Super wide trail climbs you up for a good view of the lake and is part of the Bonelli Loop Route

        Recent Ride Log Activity in Region

        Today
        • 3 rides
        Yesterday
        • 8 rides
        Past Week
        • 37 rides

        San Dimas Mountain Bike Routes

        15 miles 1,653 ft 11 Loop
        This route is originally intended for adaptive riders, but anyone can do it. It avoids certain obstacles...
        10 miles 1,422 ft 7 Loop
        The 10 mile Nurburgring of the West Coast, taking you round the whole outside perimiter of the Bonelli...
        3.0 10 miles 1,463 ft 8
        Fun and easy tour of Bonelli Park, enjoyable for all levels
        3.0 10 miles 1,371 ft 18 Loop
        The 10 mile Nurburgring of the West Coast, taking you round the whole outside perimiter of the Bonelli...
        3.0 8 miles 952 ft 15
        Fun loop around the lak and more
        4.0 11 miles 1,525 ft 0 Loop Race
        Cat 2/3 course for Goldstate series round 4 at Bonelli Park. The course is fairly technical and includes...

        Photos of San Dimas Mountain Bike

        52 |
        Jan 29, 2026 @ 5:37pm
        Jan 29, 2026
        43 |
        Jan 29, 2026 @ 5:37pm
        Jan 29, 2026
        21 |
        Jan 15, 2026 @ 3:52pm
        Jan 15, 2026
        62 |
        Aug 5, 2025 @ 1:21pm
        Aug 5, 2025
        59 |
        Aug 5, 2025 @ 1:21pm
        Aug 5, 2025
        64 |
        Apr 25, 2025 @ 8:41am
        Apr 25, 2025
        58 |
        Apr 21, 2025 @ 9:30am
        Apr 21, 2025
        43 |
        Apr 21, 2025 @ 9:27am
        Apr 21, 2025
        51 |
        Apr 21, 2025 @ 9:21am
        Apr 21, 2025
        85 |
        Jun 2, 2024 @ 12:57pm
        Jun 2, 2024
        137 |
        Apr 1, 2024 @ 2:24pm
        Apr 1, 2024
        90 |
        Apr 1, 2024 @ 2:20pm
        Apr 1, 2024

        Videos of San Dimas Mountain Bike

        Fishermam's Lake Trail
        3:46 | 118 | Aug 5, 2019
        Introductin the Magura HC Lever Upgrade
        trail: 57
        0:55 | 65 | Jan 31, 2017
        Introductin the Magura HC Lever Upgrade
        trail: 57
        0:55 | 401 | Jan 31, 2017
        Sunday rocks 3/13/16
        0:27 | 221 | Mar 14, 2016
        Trying to Follow Neko Mulally
        3:39 | 538 | Sep 29, 2014
        Johnson Mountan Way - Rocky Peak - Simi Valley, CA
        9:14 | 215 | Dec 26, 2013
        Rocky Trail
        14:59 | 177 | Nov 21, 2024 , San Dimas
        Corkscrew
        trail: Corkscrew
        14:59 | 147 | Nov 21, 2024 , San Dimas

        Recent Trail Reports

        Activity Feed

        usernameactiontypetitledate
        catalinamixerwishlisttrailactivity #96494557
        Jun 7, 2026 @ 1:43pm
        Jun 7, 2026
        FedericoIZRNELriddenrouteactivity #95405725
        May 24, 2026 @ 7:03am
        May 24, 2026
        Bran01wishlistrouteactivity #95291831
        May 22, 2026 @ 11:29pm
        May 22, 2026
        rizzantaddreportactivity #94973806
        May 18, 2026 @ 7:11am
        May 18, 2026
        weeyomppwishlisttrailactivity #94619407
        May 13, 2026 @ 5:04am
        May 13, 2026

        Recent Comments

        usernametypetitlecommentdate
        BlindJoeDeathtrailWalnut RidgePretty steep, wasn’t expecting it
        Apr 24, 2026 @ 4:45pm
        Apr 24, 2026
        highway395trailExperttrail is blocked off now remove plz
        Sep 10, 2025 @ 9:20am
        Sep 10, 2025
        BlindJoeDeathtrailAntonovichTrail really isn’t that fun. No obstacles...
        Sep 5, 2025 @ 3:34pm
        Sep 5, 2025
        alagis81trailCactusDefinitely steeper of the trails and very...
        Jul 22, 2025 @ 5:10am
        Jul 22, 2025
        strmfshr57trailSanctumA bit dry and loose. I think it is more PURPLE...
        Jun 21, 2025 @ 2:19pm
        Jun 21, 2025

        Local Badges


        Activity Type Stats

        activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
        Mountain Bike3519 miles3,848 ft9 miles2,953 ft
        #2,350#840114286613,787
        E-Bike92,910 ft213 ft1,490 ft167 ft
        #5,325#1,65123411,492
        Horse22,910 ft213 ft1,490 ft167 ft
        31
        Hike3519 miles3,848 ft9 miles2,953 ft
        #1,802#7861286250
        Trail Running3519 miles3,848 ft9 miles2,953 ft
        #6,615#2,1552286275

        Frequently Asked Questions About San Dimas

        What are the best places to ride in San Dimas?
        San Dimas has 1 areas to explore for mountain biking. The top rated areas are:
        What are the highest rated mountain biking trails in San Dimas?
        The highest rated mountain biking trails in San Dimas are: View all mountain biking trails sorted by rating.
        What is the best time of the year to ride in San Dimas?
        Based on ride log data, the most popular months to ride in San Dimas are:
        • July (76 activities)
        • May (62 activities)
        • October (62 activities)
        Check the San Dimas reports page for current trail conditions, recent trail reports, and seasonal information from the local community.
        Where can I park to ride in San Dimas?
        There are 7 parking locations listed in San Dimas. The most popular parking spots are: View all parking and trailhead locations on the map to plan your visit.
        • By derkderkallTF Pro & contributors
        • Admins: CORBA
        • #14667 - 5,078 views

        Downloading of trail gps tracks in kml & gpx formats is enabled for San Dimas.
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