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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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Trail Ridden Direction
The intended direction a trail should be ridden.
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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
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        The town of Index is in Snohomish County, along Hwy 2.
        Activities Click to view
        Region Details
        • 5

        Region Status
        Open as of May 24, 2026
        Local Trail Association

        Stats

        Trails (view details)
        45
        Trails Mountain Bike
        5
        Trails E-Bike
        5
        Trails Horse
        10
        Trails Hike
        46
        Trails Trail Running
        45
        Trails Dirtbike/Moto
        5
        Trails Observed Trials
        5
        Trails ATV/ORV/OHV
        5
        Trails Snowshoe
        3
        Trails Backcountry Ski
        3
        Total Distance
        148 miles
        Total Descent
        21,187 ft
        Total Vertical
        6,576 ft
        Highest Trailhead
        7,128 ft
        Reports
        37
        Photos
        18
        Ridden Counter
        1,259

        Articles

        Seattle, WA: Bridal Veil Falls Loop to Lake Serene
        Sep 19, 2013 from backpacker.com
        Walk among mountain falls and imposing cliffs on this hike to Lake Serene in Washington state.
        Sub Regions

        Recent Ride Log Activity in Region

        Today
        • 0 rides
        Yesterday
        • 1 rides
        Past Week
        • 2 rides

        Photos of Index Mountain Bike

        report
        55 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        47 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        42 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        39 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        29 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        40 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        44 |
        Jul 9, 2024 @ 2:05pm
        Jul 9, 2024
        report
        22 |
        Jul 9, 2024 @ 2:01pm
        Jul 9, 2024
        46 |
        Dec 2, 2023 @ 1:40pm
        Dec 2, 2023
        87 |
        Sep 20, 2019 @ 10:30pm
        Sep 20, 2019
        66 |
        Sep 20, 2019 @ 10:30pm
        Sep 20, 2019

        Recent Trail Reports

        no previous reports, add one now!

        Activity Feed

        usernameactiontypetitledate
        sillydaddyaddreportactivity #95524103
        May 25, 2026 @ 2:32pm
        May 25, 2026
        RichardzE0jk4wishlistregionactivity #89210840
        Feb 19, 2026 @ 11:13pm
        Feb 19, 2026
        MasonRakeraddreportactivity #86609979 and 1 more
        Jan 3, 2026 @ 7:47pm
        Jan 3, 2026
        jpbrastadaddreportactivity #85695666
        Dec 18, 2025 @ 7:30am
        Dec 18, 2025
        joracineaddreportactivity #84874372 and 1 more
        Nov 28, 2025 @ 3:36pm
        Nov 28, 2025

        Local Badges


        Activity Type Stats

        activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
        Mountain Bike512 miles1,155 ft3 miles2,044 ft
        #11,761#3,604183591
        E-Bike512 miles1,155 ft3 miles2,044 ft
        #6,817#2,049342
        Horse1036 miles3,510 ft10 miles3,425 ft
        #1,527#8987
        Hike46148 miles21,188 ft46 miles6,578 ft
        #1,440#65437161,385
        Trail Running45139 miles21,175 ft46 miles6,578 ft
        #1,477#521376115
        Dirtbike/Moto512 miles1,155 ft3 miles2,044 ft
        #1,064#419133
        Observed Trials512 miles1,155 ft3 miles2,044 ft
        #253#6311
        ATV/ORV/OHV512 miles1,155 ft3 miles2,044 ft
        #874#4001
        Snowshoe35 miles141 ft4,882 ft4,442 ft
        4
        Backcountry Ski35 miles141 ft4,882 ft4,442 ft
        20

        Frequently Asked Questions About Index

        What are the best places to ride in Index?
        Index has 3 areas to explore for mountain biking. The top rated areas are:
        Where can I park to ride in Index?
        There are 16 parking locations listed in Index. The most popular parking spots are: View all parking and trailhead locations on the map to plan your visit.
        What are the best & highest rated hiking trails in Index?
        How many trails are in Index?
        Index has a total of 45 trails. Of those, 5 are designated for mountain biking. Browse top mountain biking trails in Index to find detailed information including difficulty ratings, distances, and trail conditions.
        • By I5-TrollTF Pro EMBA-Staff & contributors
        • Admins: EMBA-C2S, EMBA-C2S
        • #29359 - 2,839 views

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