3,558 ft
Avg time

Grand Chasm Details

  • Riding area
  • Difficulty rating
  • Trail type
  • Bike type
    AM, XC, Fat
  • Trail Usage
    Biking Only
  • Direction
    Downhill Primary
  • Climb Difficulty
  • Physical rating
  • Season
  • TTFs on trail
    Berm, Bridge, Drop, Jump, Ladder Bridge, Rock Face
  • Ride in rain
  • Global Ranking

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
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Blacksheep Mountain Bike Club (blacksheepmtb.com)
Please consider joining or donating to the local riding association to support trail development & maintenance.
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More Stats for Grand Chasm mountain bike trail
  • Altitude min
    899 ft
  • Altitude max
    900 ft
  • Altitude start
    900 ft
  • Altitude end
    900 ft
  • Grade max
  • Grade min
  • Avg time
  • view trail stats
on May 16, 2016
Avg: 5 (2 votes)

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Grand Chasm Trail Reports

May 16, 2016 @ 5:24am
May 16, 2016
Trails are mostly dry. There are still some soft spots, so please be considerate to not rut them out.
Sep 15, 2015 @ 5:51am
Sep 15, 2015
This trail is closed until further notice while the city Parks Department works on fencing off the collapsing mine shafts. Once the work is...
Sep 11, 2015 @ 7:01pm
Sep 11, 2015
Perfect! Thanks blacksheep
Sep 11, 2015 @ 7:00pm
Sep 11, 2015
In perfect shape! Thanks blacksheep!
Jul 22, 2015 @ 6:03pm
Jul 22, 2015
view all reports »

Technical Trail Features (TTF)


more »
74 |
Aug 9, 2016 @ 7:52am
Aug 9, 2016
Grand Chasm, Thunder Bay
74 |
Aug 9, 2016 @ 7:51am
Aug 9, 2016
Grand Chasm, Thunder Bay
82 |
Aug 9, 2016 @ 7:49am
Aug 9, 2016
Grand Chasm, Thunder Bay
126 |
Aug 9, 2016 @ 6:00am
Aug 9, 2016
Grand Chasm, Thunder Bay

Routes with this trail

Park City Point 2 Point race featured
76.2 miles
Park City Point 2 Point 2015 race featured
73.1 miles

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Shuniah Mines Pretzel Trail
285 | Nov 6, 2014 Grand Chasm, Thunder Bay
  • embed Grand Chasm trail on your website
    • Updated on Wed 2016-06-08 @ 11:23am
    • Submitted on Thu 2014-10-23 @ 12:25pm
    • By WanderingMan BSMTB & contributors
    • #18215 - 1,321 views
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