3,558 ft
Distance
00:06:06
Avg time

Grand Chasm Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
    • Snowshoe
  • Riding Area
    Trowbridge Forest
    Thunder Bay, Ontario
  • Difficulty Rating
  • Hiking SAC Scale
    T1 Hiking
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC, Fat
  • Trail Usage
    Multi-use
  • Direction
    Downhill Primary
    Popular direction shown
  • Climb Difficulty
    Blue
  • Physical Rating
    Moderate
  • Season
    May-Oct
  • Dogs Allowed
    Yes
  • TTFs on Trail
    Berm, Bridge, Drop, Jump, Ladder Bridge, Rock Face
  • Ride in Rain
    Yes
  • Global Ranking
    #1898 in Mountain Biking
  • Local Popularity
    100 in Mountain Biking [+]
    • 80 in Trail Running
    • 50 in Hiking
    • 85 in Snowshoeing

Originally built in the the mid 90's the area around Grand Chasm has seen significant changes over the years and multiple lines developed as local riders looked to take advantage of the terrain and natural features around the heart of the old mines.

In 2011 the local mountain bike club, in consultation with IMBA representatives, started to redevelop and align the trails in order to improve flow, length and sustainability of the trail. After nearly 4 years of work the final produce was unveiled and a new 1.1km signature trail was opened in Shuniah Mines. Riders are now treated to a true flow trail with long sweeping sections, bermed corners, and plenty of optional tech features including; a ladder bridge, roll-able jumps and rock features. The new trail takes advantage of modern trail building techniques, while still maintaining the "old school" feel.

*New for 2016*
Due to the closures of old mine shafts in the area by the city of Thunder Bay, the top portion of Grand Chasm has required significant re-routing. Local builders with the support of the city have been given the opportunity to complete the first machine built section of trail in Shuniah Mines. Expected to open when work is completed in the spring of 2016, the new top portion of the trail will contain some of the largest XC features every constructed in the trail system.

Local Trail Association
More Stats for Grand Chasm mountain bike trail trail
  • Altitude min
    899 ft
  • Altitude max
    900 ft
  • Altitude start
    900 ft
  • Altitude end
    900 ft
  • Grade max
    -0.445%
  • Grade min
    0.728%
  • Avg time
    00:06:06
  • Avg reverse time
    00:10:12
  • view trail stats
Status:
on Apr 30, 2021
Variable
Avg: 4.85 (7 votes)

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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
Contribute Details
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

Radar Time
      Directions to grand-chasm trailhead (48.476760, -89.206510)
      update trails status or condition

      Grand Chasm Trail Reports

      statusdatedescription
      Apr 30, 2021 @ 7:59am
      Apr 30, 2021
      reporter Ready to ride! Drying up and freshly leaf blown. Please ride through the occasional puddle, not around.
      Apr 25, 2021 @ 11:49am
      Apr 25, 2021
      reporter Things are still wet from recent rain and the low temps bring out frost. Things should be opening up soon with warm temps coming later this week.
      Apr 22, 2021 @ 5:29pm
      Apr 22, 2021
      Two fallen trees cut off trail.
      Apr 22, 2021 @ 11:05am
      Apr 22, 2021
      reporter Trails are wet from the recent snowfall melting. Please avoid them to prevent trail damage until things dry out.
      Apr 22, 2021 @ 11:03am
      Apr 22, 2021
      reporter
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 49 rides
      • 10 miles avg distance
      6 Months
      • 362 rides
      • 10 miles avg distance
      All
      • 2,442 rides
      •  

      Photos

      more »
      138 |
      Feb 18, 2019 @ 11:00am
      Feb 18, 2019
      91 |
      Nov 2, 2018 @ 4:00pm
      Nov 2, 2018
      57 |
      Nov 2, 2018 @ 3:59pm
      Nov 2, 2018
      124 |
      Jan 27, 2018 @ 8:36am
      Jan 27, 2018

      Routes with this trail

      titleratingdistance
      Shuniah FORTY Miner race
      7 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.


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      Videos

      more »
      Shuniah Mines Pretzel Trail
      1065 | Nov 6, 2014 , Thunder Bay
      Fall-time in Shuniah
      0:59 | 218 | Nov 2, 2018 , Thunder Bay
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