3 events in Thunder Bay, Ontario

From big races to Saturday morning group runs—find trail running events and connect with the local endurance sports community.

• High Noon 24Hr Trail Race & Relay [upriverrunning.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Jun 27, 2026 at 8:00 AM

  Relay Trail Ultra

  851 20th Side Rd, Thunder Bay, Ontario, Canada
  OpenStreetMap Google Maps
• XTERRA Sleeping Giant - 2026 [xterraplanet.com] [Register at raceroster.com]
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  Sun, Aug 16, 2026 at 8:00 AM

  Description

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  At the head of Lake Superior, in Ontario’s northwest the City of Thunder Bay has a wealth of outdoor adventure opportunities. Taking advantage of purpose-built mountain bike and recreation trails...

  At the head of Lake Superior, in Ontario’s northwest the City of Thunder Bay has a wealth of outdoor adventure opportunities. Taking advantage of purpose-built mountain bike and recreation trails built over unique mesa rock formations cover in Boreal forest. Don’t miss this chance to enjoy what northwest Ontario has to offer.

  Additional event information, including course maps

  • Event Website

  • Full Tri

  • Sprint Tri

  • Super Sprint

  • Duathlon

  • Trail Run - 10k

  • Trail Run - 5k

  5k 10k 11k 18k 20k 21k 35k 40k 46k Cycling Duathlon Run Trail Triathlon

  Lyon Boulevard West, Thunder Bay, Ontario, Canada
  OpenStreetMap Google Maps
• UpRiver Running Fall Races [upriverrunning.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Oct 03, 2026

  10k 25k 50k Kids Run Trail Ultra

  Kinsmen Park Trowbridge Rd, Thunder Bay, Ontario, Canada
  OpenStreetMap Google Maps

Local Clubs & Organizations