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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail 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%
Trail Last Ridden
Trailforks scans ridelogs 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
ContributeDetails
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
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.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches

LEGEND
Trail Difficulties
  • Access Road/Trail
  • White
  • Green
  • Blue
  • Black
  • Double Black Diamond

Trail Report Status
  • Clear / Green
  • Minor Issue / Yellow
  • Significant Issue / Amber
  • Closed

  • Land Owner Overlay
  • Wilderness (typically no bikes in USA)
  • BLM (public)
  • USFS (Wildlife sanctuaries darker than usfs)
  • State land
  • Indigenous
  • Military
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
  • Map Markers
  • trail Trail Head
  • photo Photo
  • place Directory Listing
  • region Riding Area
  • TTF TTF
  • Parking Parking
  • Viewpoint Viewpoint
  • Information Information
  • Warning Warning
  • Directions Directions
  • Sight Sight
  • Restrooms Restrooms
  • eBike Charging Point eBike Charging Point
  • Water Fountain/Source Water Fountain/Source
  • Gate Gate
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Ladder Ladder
  • Stairs Stairs
  • Bridge Bridge
  • Camping Camping
  • Cabin Cabin
  • Lodge Lodge
  • Bear Cache Bear Cache
  • Dock Dock
  • Ranger Station Ranger Station
  • Summit Summit
  • Other Other
      Oldest park in San Jose connects to Sierra Vista Open Space Preserve
      Primary Trail Type: Cross-Country
      Parking google parking directions
      Region Details
      • 2
      • 8
      • 7
      • 1

      Region Status
      Open as of Jul 26, 2020

      Stats

      Avg Trail Rating
      Trails (view details)
      19
      Trails Mountain Bike
      23
      Trails Hike
      25
      Trails Trail Running
      23
      Total Distance
      15 miles
      Total Descent
      2,207 ft
      Total Vertical
      1,763 ft
      Highest Trailhead
      2,062 ft
      Reports
      40
      Photos
      16
      Ridden Counter
      592

      Photos of Alum Rock Park Mountain Bike

      trail: Todd Quick
      5 |
      Jul 25, 2020 @ 11:42am
      Jul 25, 2020
      3 |
      Jul 23, 2020 @ 7:28pm
      Jul 23, 2020
      5 |
      Jul 23, 2020 @ 7:27pm
      Jul 23, 2020
      1 |
      Jul 23, 2020 @ 7:27pm
      Jul 23, 2020

      Videos of Alum Rock Park Mountain Bike

      Sierra Vista trial
      6:10 | 7 | Aug 5, 2020 , San Jose

      Recent Trail Reports

      Activity Feed

      usernameactiontypetitledate
      user #2256855Rockhopper87addvideoSierra Vista trial
      Aug 5, 2020 @ 10:15am
      2 days
      user #2022547ashtondavotetrailSierra Vista
      Aug 5, 2020 @ 7:38am
      2 days
      user #2317441ElgurpleriddentrailBoccardo Loop and 2 more
      Aug 2, 2020 @ 1:52pm
      Aug 2, 2020
      user #2333565BtaclanriddentrailBoccardo Loop
      Aug 2, 2020 @ 12:08pm
      Aug 2, 2020
      user #2333565BtaclancommenttrailAlum Rock Falls Road
      Aug 2, 2020 @ 12:07pm
      Aug 2, 2020

      Recent Comments

      usernametypetitlecommentdate
      user #2333565BtaclantrailAlum Rock Falls RoadThis is a private road from calavaras fault...
      Aug 2, 2020 @ 12:07pm
      Aug 2, 2020

      Nearby Areas

      namedistance
      Lake Cunningham5 km
      Joseph D. Grant County Park 8 8 16 km
      Mission Peak 10 77.1 km
      Santa Teresa County Park 6 9 2 113.4 km
      Del Valle Regional Park 5 413.8 km
      • By joefabris & contributors
      • Admins: SVMTB
      • #22307 - 2,710 views
      • alum rock park activity log | embed map of Alum Rock Park mountain bike trails | alum rock park mountain biking points of interest
      • subscribe print map 3d map donate to earn trail karma!

      Downloading of trail gps tracks in kml & gpx formats is enabled for Alum Rock Park.
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