Unlimited Distances • 28k Relay
New Obscura-style race format for 2027 for distances of 9km to over 160km!
Get into fall running mode and enjoy the Castle Mountain Resort area. Castle is a secluded gem of a place that everyone should make an effort to visit.
Castle Alpine Trail Ultra (let's call it CAT, OK?) combines wide-open vistas, rugged single track, off-trail running, and so much delicious climbing. While it isn't an extraordinarily long race distance-wise, CAT is like a schoolyard bully - it's going to rough you up and doesn't relent the whole day.
This is a classic trail run covering two mountain summits and one of the most serene alpine valleys in the region. Each stage starts and ends at Castle Mountain Resort, so you don't even really need a support crew - just park your kit in the staging area and do some quick transitions. Leg 1 runs clockwise, Leg 2 counterclockwise, and Leg 3 clockwise.
This year, we are introducing the Obscura series and a new format to the race. If you register for the Ultra – Unlimited Distances, you can run as many of the stages as you want within the 24-hour cutoff. You can also register for the Half Marathon alone, which is the first stage of the race. We still have the relay team of 6 option, which follows the original 6-stage format. Check out the Obscura series info here.
Castle Mountain Resort offers a variety of accommodations including private rooms, a hostel, and BnBs so make a weekend out of it and enjoy your stay. Being that it is September, you can expect a chance of snow and definitely a bone-chilling wind at the top of the mountain, or it can be hot... so bring all the gear!
While you're here, check out the flora and fauna. Castle is known for its wildlife viewing and exploring in the spring through fall, before the ski season starts.
Climb to the heights of the Castle!
Be sure to check out the Racer Details for complete event information.
Registration fees
Where pricing applies, shown amounts include mandatory charges, items, and fees.
Solo – Unlimited Distances
Price changes in 5 months 9 days-
You can run any distance from 9km to over 160km if you have the legs
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Register for Solo – Unlimited DistancesCA$245.00
Early bird pricing
Now registering Oct 20 – Mar 31 -
CA$260.00
Regular Price
Apr 1 – Sep 5 -
CA$275.00
11th Hour!
Sep 6 – Sep 17
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Castle Alpine Relay – 28k
Price changes in 5 months 9 days-
Note that you can add teammates after registering by getting them to sign up individually, then select to join your team. You can also enable an access code so that you don't get strangers joining. You must start with two teammates to register a team.
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Register for Castle Alpine Relay – 28kCA$199.00
Per person - Early bird pricing
Now registering Oct 20 – Mar 31 -
CA$210.00
Per person - Regular Price
Apr 1 – Sep 5 -
CA$220.00
Per person - 11th Hour!
Sep 6 – Sep 17
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Event schedule
- Fri, September 17, 2027 5:00 PM - Racer Check-in
- Fri, September 17, 2027 7:00 PM - Racer Meeting
- Fri, September 17, 2027 7:45 PM - Volunteer Meeting
- Sat, September 18, 2027 6:30 AM - Late Check-in (by reservation only)
- Sat, September 18, 2027 9:00 AM - Race Start
- Sat, September 18, 2027 5:00 PM - Dinner
- Sat, September 18, 2027 5:30 PM - Course closes
- Sat, September 18, 2027 5:30 PM - Awards
Contact information
- Event contact
- Race HQ
- Website
- Visit website
