The Course

The course is 5000m (5K) long. This has been accurately measured by us with a professional measuring wheel. The course is at Duffins Trail, Ajax. The course is run entirely on trail paths. Some sections of the course may accumulate mud, leaves and puddles after rain. Dependent on availability, marshals will be at key sections of the course, or signs will be in place.

Please remember that the parkrun uses shared paths. For the continued success of the event, please give way to other park users. This won't hurt your time, it won't stop you from getting a PB and it will make sure everyone continues to enjoy the event.

Please, wherever possible walk, jog, cycle or use public transport when attending the event. If you do have to drive, please consider car-sharing to reduce our impact on both the environment and other park users. Please also watch out for other park users when arriving and leaving. Parking may be limited so try to arrive early.

Course Safety

The Duffins Trail parkrun is a fun, free event organised by volunteers for the benefit of everyone. We wish to make the run as safe as possible, so runners, spectators and helpers are asked to take care about the following:

  • Please be considerate to the park and other park users at all times.
  • Children under the age of eleven must be accompanied (within arm's reach) throughout the run by a parent, guardian or appropriate adult of the parent's choice.
  • Please arrive by foot, by pedal-power or by public transport if you can - your efforts help to reduce our impact on the park and the planet.
  • Please consider volunteering to help occasionally - this event survives only because of your generosity - please visit the volunteer page for more information.
  • Take care near roads and car parks - some vehicles drive very quickly. Please congregate away from the cars and be careful in particular if you have children. If you’re driving to the run, please drive carefully even if you’re late!
  • When running, take care on uneven surfaces - whether on grass or on tarmac. Watch out for cyclists, other runners, pedestrians, children, dogs, wildlife, park animals, vehicles, park maintenance work, falling branches, bollards, posts and other obstacles around the course.
  • Please ensure that you are fit enough to walk, jog, run 5k (3.1 miles) with us. Health advice about running can be found at the excellent Runners' Medical Resource website (although this external website focuses on preparation for a race and does not describe parkrun events).
  • Remember to warm up before the run.
  • If you see a runner with a serious problem, please stop to help them out and get help as soon as possible.
  • If you’re watching, keep clear of runners on the course, and look after any children and dogs you may have with you.
  • It is not permitted to run with a pushchair and a dog at the same time.
  • Lyme Disease is a bacterial infection spread to humans by infected ticks. Consider protecting yourself by wearing repellent when at parkrun events in grassy or wooded areas. See for further details.
  • You are welcome to take part with a dog, but please keep the dog on a short lead or short harness and under control throughout the event. Please also review the parkrun support page article about running with a dog at parkrun events.
  • Runners pushing buggies are welcome, but please take extreme care of other runners around you. If possible start from the back of the field and try to keep to one side of the main body of runners.

We hope these tips help to ensure that Duffins Trail parkrun is fun and safe for everyone.

Age Grading

All parkrun events use Age Grading to help parkrunners compare results.

Age Grading takes your time and uses the world record time for your sex and age group to produce a score (a percentage). This score allows you to compare your personal performance against other people's performances even though they might be a different age and a different sex to you - the higher the score the better the performance. The scores can also be compared across different race distances - to allow you to, for example, compare a 5km time against a marathon.

For more information, please see our Support page.

Course Map

Course Description

A beautiful out & back course covering a small section of the Trans-Canada Trail along Duffins Creek. Expect a wide, hard-packed, multi-use path that offers lush greenery on either side of the trail which crosses over the river several times. The start / finish is just across the road from The Courtyard parking lot.


No washrooms on site, but there are a number of stores & vendors near the start / finish with restrooms.

Getting There

Location of start

The event starts across the road from The Courtyard parking lot.

Getting there by public transport

From Ajax GO (train arrives 7:54 from Union Station):
Option A: Take 219 bus to Kingston (stop #2569), then 900 to Elizabeth (stop #1598).
Option B: Take 232 bus to Church/Kingston (stop #92008). Cross over both Kingston & Church Str and walk 7mins west down Old Kingston Rd.

From Pickering GO (Train arrives 7:49 from Union Station):
Take 223 bus to Kingston/Liverpool (stop #1730). Take the 900 bus to Elizabeth (stop #2233).

The DRT 900 Pulse travels between Scarborough & Oshawa every 30 minutes, arriving at Elizabeth 7:57 and 8:27am. Please see the Durham Region Transit or Go Transit websites for details.

Getting there on foot

From The Courtyard / Old Kingston Rd parking, walk west and cross over Elizabeth Str to reach the start / finish.

The 4 closest bus stops are all a 7 minute or less walk from the start / finish.

Getting there by road

If travelling on the 401 east, exit at Brock Rd and head north. Turn right (east) on Kingston Rd and after 1km turn left into Elizabeth Str.

If travelling on the 401 west, exit at Westney Road and head north. Turn left (west) on Kingston Rd and after 1.5km turn right into Elizabeth Str.

The start / finish will be on your left. The bulk of the parking on the right up Old Kingston Rd, plenty of free parking is also available at The Courtyard parking lot.

Post Run Coffee

Every week we grab a post parkrun coffee in The Waypoint, 90 Old Kingston Rd, Ajax, L1T 2Z8 - please come and join us!