Sulphur Springs Trail Race

Some races become traditions, others become Legends. SSTR is Ontario's ONLY Western States Qualifier

Since 1992, the Sulphur Springs Trail Race has welcomed runners to the beautiful trails of Ontario's Niagara Escarpment, growing into Canada's oldest continuously running ultramarathon. Hosted by the Burlington Runners Club, this iconic race combines a challenging trail course, an unforgettable community atmosphere, and distances ranging from a beginner-friendly 10K to a demanding 100-mile adventure.

Whether you're chasing your first trail race finish, building toward your first ultramarathon, or pursuing a Western States qualifying performance, Sulphur Springs delivers one of Canada's premier trail running weekends.

Course Description

This race takes place on a thoughtfully designed system of 10K and 20K loops through the scenic Dundas Valley Conservation Area in Hamilton, Ontario. The course offers a variety of terrain, including smooth groomed trails, flowing double track, moderately technical singletrack, rolling runnable sections, and short but punchy climbs and descents. Each 20K loop features more than 500 metres of elevation gain, creating a course that rewards smart pacing and consistent effort rather than pure speed.

Gather some steam at the end, as you climb the Highest Degree of Difficulty on the course at the end of each loop - the legendary Martin Road climb. Smile at the top; you've earned it.

Course Maps

GPX Links:
10K GPX Link
20K GPX Link

Note: 50K is 1 loop of the 10K course, followed by 2 loops of the 20K course.
Link to Map

Runner Experience & FREE Swag

The SSTR has earned its reputation as one of Canada's premier trail running events by combining a challenging course with an incredible trail festival vibe, runners will find an atmosphere built on encouragement, camaraderie, and a shared love of the trails.

For our 35th Running of the Sulphur Springs Trail Race, we are giving our runners a commemorative SSTR 35th Technical T-shirt and Technical Hat. Be sure that you select your colour and size in the 2027 SSTR Swag Shop. Click HERE to find FREE Swag and more.

Aid Stations & Support

Each 20K loop features four fully stocked aid stations offering hydration, nutrition, and friendly volunteers ready to keep you moving. During the overnight hours, runners in the longer distances can also expect hot food in addition to classic ultramarathon favorites.Sulphur Springs Trail Race is a CUP-FREE event, so every runner should carry a reusable cup, bottle, or hydration system.

Western States Qualifier

The Sulphur Springs Trail Race is proud to be a Western States Endurance Run qualifying race. Runners have the opportunity to earn a coveted lottery ticket for the WSER 100 lottery at Sulphur Springs, runners must achieve one of the following qualifying performances:

• Finish the 100K in under 18 hours.
• Finish the 100 Mile in under 30 hours.

Qualification standards and the lottery process are administered by the Western States Endurance Run and may change from year to year. Runners planning to use Sulphur Springs as their qualifier should review the current Western States lottery requirements before race weekend.

The Complete 2027 SSTR Runners Guide

Of course you have questions about the Sulphur Springs Trail Race. Click HERE to view the complete PDF of the 2027 SSTR Runner's Guide. This Guide is Dynamic as the race approaches, so if it missing some details, check back later,

Charitable Partners

Click here to make your donations

Hamilton Conservation Foundation

Your gift through the Foundation can safeguard ecologically significant lands and waterways; give young people hands-on nature education without financial barriers; help our region mitigate climate change challenges while protecting at-risk species; enrich visitors' experiences of conservation areas through trail improvements and accessibility features; and so much more.

Trees for Hamilton

Make a donation to Trees for Hamilton, to support their efforts to increase the tree canopy in Hamilton by planting trees in green spaces, such as Dundas Valley.

Fit Active Beautiful Foundation

FAB aims to eliminate barriers by providing youth girls in grades six through eight with the goal-setting skills necessary to lead an empowered life.

Race Management

The Sulphur Springs Trail Race is hosted by the Burlington Runners Club, a not-for-profit running organization that has been promoting road and trail running in the Burlington area for more than 50 years.

Race operations are managed byStraw Dog Racing. We are committed to delivering a safe, professionally organized, and memorable race experience while preserving the welcoming community atmosphere that has made Sulphur Springs a favorite destination for trail runners across North America.

Protect Your Entry with Refund Guarantee

Life happens. Training injuries, family emergencies, work conflicts - things come up. Refund Guarantee from SPOT gives you a way out if you can't make it to the Eagleton Trail Challenge.

Here's how it works: You add coverage at checkout for a small fee. If something covered happens and you can't race, you file a claim directly with SPOT and get your entry fee back. The race keeps your registration either way, and SPOT handles the refund. No back and forth with the race director.

Important:Refund Guarantee doesn't cover event cancellations or postponements. As stated in the waiver, entry fees are non-refundable if the event is cancelled. Refund Guarantee only covers you personally not being able to participate.

Questions about coverage? Check SPOT's terms or contact their support team.

Your Race Sponsors

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Event's current local time: 3:52 PM ET