1,696 ft
7 ft
-81 ft
390 ft
High Point

Sudden Impact Details

  • Riding Area
    Vietnam Trail Network
    Milford, Massachusetts
  • Difficulty Rating
  • Trail Type
  • Bike Type
    AM, XC, Fat
  • Trail Usage
    Biking Primary
  • Direction
    Downhill Primary
  • Climb Difficulty
  • Physical Rating
  • Family Friendly
  • eBike Allowed
  • TTFs on Trail
    Berm, Rock Garden, Roller Coaster
  • Ride in Rain
  • Global Ranking
    #3144 in Mountain Biking
  • Local Popularity
    65 in Mountain Biking [+]
    • 5 in Trail Running
    • 5 in Hiking

Sudden impact is one of the nicest new cross country style trails at Vietnam. Fun and flowy with some moderate tech in the form of rock roll-overs, one or two small drop-offs and a short steep section at the end, it is a well defined Singletrack trail suitable for all skills levels, from novice to advanced depending on what speed you go. While it can be ridden in both directions, it is most fun as a down hill trail, starting on Right turn Clyde. Right at the beginning there are two easy rock formations to ride over, on the second rock you turn right, down a small drop-off, towards the fire pit where you turn left. Follow the twisty flowy single track, across the Holliston Highway, past Humpback on the right all the way down to where it joins Forest Town. This trail is a must ride!

Access Info

Sudden Impact has three access points. If you want to ride the whole trail as a down hill, you can access Sudden Impact from about the mid-point of Right turn Clyde. If you want to do it as an easy to moderate climb, you can start it from the bottom end on Forest Town, between Optional Rocks and the Tonto turn-off. Otherwise you can enter the trail about mid-way, where it crosses over Holliston Highway.

Local Trail Association
More Stats for Sudden Impact bike trail
  • Altitude change
    -74 ft
  • Altitude min
    311 ft
  • Altitude start
    385 ft
  • Altitude end
    311 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    241 ft
  • Distance down
    1,306 ft
  • Distance flat
    149 ft
  • view trail stats
on Jun 16, 2018
Avg: 5 (1 votes)

view (201)
Trail Conditions
  • Unknown
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • 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 Ridden Direction

The intendid direction a trail should be ridden.

  • Downhill Only
  • Downhill Primary
  • Both Directions
  • Uphill Primary
  • Uphill Only
  • One Direction

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

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

  • 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 Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
  • Map Markers
  • trail Trail Head
  • photo Photo
  • place Directory Listing
  • region Riding Area
  • Parking Parking
  • Viewpoint Viewpoint
  • Information Information
  • Warning Warning
  • Directions Directions
  • Water Fountain/Source Water Fountain/Source
  • Sight Sight
  • Restrooms Restrooms
  • Gate Gate
  • Camping Camping
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Other Other
      Directions to sudden-impact trailhead (42.178080, -71.489560)
      update trails status or condition

      Sudden Impact Trail Reports

      Jun 16, 2018 @ 4:23am
      Jun 16, 2018
      reporter Sudden Impact is in great shape!
      Jun 9, 2018 @ 5:39am
      Jun 9, 2018
      reporter These trails are all in great shape. Awesome riding!
      Apr 28, 2018 @ 6:25pm
      Apr 28, 2018
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 1 rides
      • 17 miles avg distance
      6 Months
      • 95 rides
      • 8 miles avg distance
      • 176 rides


      no photos have been added for Sudden Impact yet, add a photo.

      Routes with this trail

      more »
      Vietnam for Laqueshaaa
      15 miles
      Vietnam for Beginners 2
      4 miles
      Vietnam Demo Route D
      4 miles
      Vietnam Demo Route B
      3 miles

      Reviews / Comments

      No reviews yet, be the first to write a review or ask a question.
      Use trail reports to comment on trail conditions.

      Post a Comment

      You must login to Pinkbike.
      Don't have an account? Sign up

      Join Pinkbike  Login


      no videos have been added for Sudden Impact yet, add a video.
      • subscribe
      • flag
      • login to download gpx or kml files.