43K
43k Trail Race
Fri, Sep 19 · 10:00 PM
$105.72
Race
- Past race
- Trail
Monster of Mazinaw Trail Race 2025
- Cloyne, Ontario
Hosted byHappy Trails Racing
About Monster of Mazinaw Trail Race 2025
The Monster of Mazinaw Trail Race is an annual trail running event held at Bon Echo Provincial Park near Cloyne, Ontario. It features a variety of terrains including groomed trails and technical rocky single tracks, with challenging back-country sections especially on the 30k and 43k courses, ideal for experienced trail runners.
The event is Athletics Ontario sanctioned and partners with La Sportiva for demo shoes and giveaways. It offers a memorable trail running experience capped at 275 participants to preserve the quality of the race.
Distances and events
30K
30k Trail Race
Fri, Sep 19 · 10:00 PM
$94.83
10K
10k Trail Race
Fri, Sep 19 · 10:00 PM
$83.94
Prices from the organizer. Please check the official website for up-to-date times and pricing.
Highlights
Sanctioned by Athletics Ontario
Partnered with La Sportiva offering demo shoes and giveaways
Challenging technical trail terrain with back-country sections
Limited registration capped at 275 participants
Course
- Surface
- Trail
- Location
- Cloyne, Ontario
Course details
- Trail surface featuring groomed trails and rocky single track
- 30k and 43k courses have up to 10-12 km of self-supported back-country sections
- Rocky paths, numerous roots, steep ascents and descents
- Well-marked course with a full participant guide provided in advance
About the organizer
Organizer
Happy Trails Racing
More races like this
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Listing freshness
The Running Directory combines organizer-provided details, official race links, and ongoing listing research. Always confirm final dates, prices, times, and course details with the race organizer before registering.
Last updated: October 2, 2026
Official registration(opens in a new tab)