more stats
1.0 mile
Distance
214 ft
Climb
-113 ft
Descent
00:12:03
Avg time
102 ft
Altitude change
303 ft
Altitude min
406 ft
Altitude max
303 ft
Altitude start
407 ft
Altitude end
1.8%
Grade
-20.5%
Grade max
27.2%
Grade min
2,890 ft
Distance climb
1,594 ft
Distance down
1,033 ft
Distance flat
00:12:03
Avg time

Catalyst Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Hike
    • Trail Running
    • Snowshoe
  • Riding Area
    Don Valley
    Toronto, Ontario
  • Difficulty Rating
  • Voted Difficulty
    Black Diamond (3 votes)
  • Local Popularity
    90 in Mountain Biking [+]
    • 95 in E-Biking
    • 70 in Trail Running
    • 5 in Hiking
    • 5 in Snowshoeing
  • Global Ranking
    #711 in Mountain Biking [+]
    • #13917 in E-Biking
    • #151 in Trail Running
    • #1231 in Hiking
    • #1339 in Snowshoeing
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC
  • Direction
    Uphill Primary
    Popular Direction Shown
  • Climb Difficulty
    Black Diamond
  • Physical Rating
    Hard
  • Trail Visibility
    Always easy to follow
  • Dogs Allowed
    Yes
  • eBike Allowed
    Yes up to Class 1
  • TTFs on Trail
    Bridge, Drop, Jump, Gap Jump, Ladder Bridge, Skinny, Teeter Totter
  • Land Owner
    City of Toronto / Toronto Region Conservation Authority

Popular and challenging trail: well loved by many. Steep climbs. Switchbacks. Primarily located on a ravine wall. Very dangerous when wet.

Access Info

Branches off of Beaver Flats

This trail is unsanctioned.

Recent Activity on Trail

Past Week
  • 5 rides
  • 25.6 km average
6 Months
  • 67 rides
  • 25.7 km avg distance
All
  • 2,368 rides
  • Last: Sep 20, 2026
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Catalyst Trail Reports

statusdatedescription
Sep 21, 2026 @ 10:46am (America/Toronto)
2 days
Totally unridable unless you want to hike back out the way you came through overgrown trail sections and construction zones. Highly recommend not...
Aug 14, 2026 @ 3:13pm (America/Toronto)
Aug 14, 2026
Rideable up to "Old Catalyst" - didn't go further
Jul 3, 2026 @ 8:55pm (America/Toronto)
Jul 3, 2026
It's riding well up until the old construction detour. I decided to see if it was possible to get to Sky Pilot. It's extremely overgrown and has...
Jun 7, 2026 @ 1:26pm (America/Toronto)
Jun 7, 2026
Thought I'd detour along Beth Nealson Rd to connect with Party Atmosphere. The road is gone! Appears to be another casualty of Ontario Line...
Jun 1, 2026 @ 1:13pm (America/Toronto)
Jun 1, 2026
It’s really good! I rode until the construction and then hike a biked around, up to the hydro tower, and took the old Sky Pilot down walking,...
more »
Status:
on Sep 21, 2026
Variable
Avg: 3.81 (26 votes)
Your vote: 0

view (17,998)
close
      Directions to catalyst trailhead (43.704910, -79.337740)

      Photos

      47 more »
      mtb
      438 |
      Oct 25, 2020 @ 4:06pm
      Oct 25, 2020
      mtb
      77 |
      Jun 1, 2026 @ 4:19pm
      Jun 1, 2026
      mtb
      112 |
      May 8, 2026 @ 4:13pm
      May 8, 2026
      mtb
      103 |
      Aug 11, 2025 @ 5:45am
      Aug 11, 2025

      Videos

      7 more »
      youtuber Trail Riding | Massive CRASH ride with Alistair
      mtb
      22:42 | 998 | Sep 29, 2020 , Toronto
      youtuber Catalyst - A Black Diamond Trail in the Don...
      mtb
      0:27 | 3095 | May 20, 2019 , Toronto
      The Catalyst trail - October 2023
      mtb
      10:51 | 213 | Dec 8, 2024 , Toronto
      Catalyst - Don Valley MTB
      mtb
      14:16 | 684 | Jul 26, 2022 , Toronto

      Routes with this trail

      5.0 59 miles 5,018 ft 111 Loop
      100k loop through the greater Valley, the route has almost no repeat sections. Consists mostly of...
      4.0 24 miles 2,002 ft 50 Loop
      A route linking together the all the hardest trails throughout the Don Valley. This is a physically...
      3.9 16 miles 1,371 ft 56
      Big loop in the Don featuring a good mix of the standards and the more difficult trails at the north end.
      3.8
      26 Ratings
      5 35%
      4 38%
      3 8%
      2 8%
      1 12%

      30 Reviews & Comments

      Base93
      Lets talk about Catalyst in the Don Valley Trails er maybe should just rename it to Base Valley Trails Razz

      Contrary to some again this trail was started by myself and was in 2 sections.
      https://www.trailforks.com/photo/29803677/
      Yellow line was first and Orange line came later and Old cata line shortly after. Could be wrong but anyways.

      Orginally made without the bridges and was a lot tougher to ride since you had to cross the lil gullies by going along the hill or getting off the bike and crossing logs. RA made the first bridges and others widened them down the road.

      Which brings up this picture near the end of the trail.
      https://www.trailforks.com/photo/29685519/
      I remember making the trail go straight up like the red line shows just cause one should get better and make it eventually but even good climbers like myself found it too hard so the switchback was made.

      More bridges and block reinforcement just before and along the swampy areas was from others maybe from that is why they think it was their trail or maybe it was the lil jumps before that.
      Base93
      People just need to take the old routes like Old Cata/short cuts (even fix them up would be better) or take the diversion someone made to get around the construction zone untill they are done. It doesn't look good that someone is vandalizing the fences repeatedly. Also looking at the plans it looks like they will eventually be stretching the zone to Beth Nealson Drive and prob putting up a fence just after the new bypass line.
      Rye
      No more rim job? Did I see big ol titties is gone too???? Say it ain't so

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      Frequently Asked Questions

      Where is Catalyst located?
      Catalyst is located in Don Valley, Toronto, Ontario, Canada. It is part of the Don Valley trail network. The trailhead is located at coordinates 43.70491, -79.33774.
      How hard is Catalyst?
      Catalyst is rated as Black Diamond difficulty. The physical rating is Hard. The average grade is 1.8%. The climb difficulty is rated Black Diamond.
      What is the elevation gain for Catalyst?
      Catalyst has 65 m of elevation gain. The trail has 34 m of elevation descent. The elevation ranges from 92 m to 124 m.
      Is Catalyst a point to point trail?
      Catalyst is not a point to point trail. The direction is Uphill Primary. The trail type is singletrack.
      How long is Catalyst?
      Catalyst is 1.7 km long. The trail type is singletrack.
      Are dogs allowed on Catalyst?
      Yes, dogs are allowed on Catalyst. Please keep dogs on a leash where required and clean up after them.
      When is the best time of year to ride Catalyst?
      Based on activity log data, the most popular months to ride Catalyst are:
      • May (99 activities)
      • September (95 activities)
      • June (92 activities)
      Check the reports page for current trail conditions.
      How do I access Catalyst? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Catalyst are: View all parking locations in the area.
      How long does it take to ride Catalyst?
      Based on recorded activities, it takes an average of 8 minutes to ride Catalyst. The trail is 1.7 km long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      How busy is Catalyst?
      Catalyst is a very popular trail. There have been 12,648 recorded activities on this trail. The trail has received 17,998 check-ins. View recent activity on this trail.

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