Lost Our Marbles

NOV
28
2026
An indoor ultra marathon in Regina with 3, 6 and 12 hour challenges using a marble system to count laps and proceeds given to CMHA Regina Branch.
Sat 28 Nov 2026
12 Hour Challenge 3 Hour Challenge 6 Hour Challenge

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About the race

Lost Our Marbles is an indoor ultra marathon held at 1717 Elphinstone Street, Regina, SK, Canada. The event is in its second year and offers three timed challenges:

  • 3 hour challenge
  • 6 hour challenge
  • 12 hour challenge

Lap counting uses a physical marble system: each completed lap is recorded by placing a marble into a personal tin; the total marbles at the end determine distance. The event is self supported and there is no aid station. Organizers provide two readily accessible water fountains with bottle access, clean change rooms, and washrooms.

Food is not allowed on the track except water bottles; the crew and event support area is adjacent to a food court where food may be consumed. Participants have access to a safe area for storing supplies and are provided a chair beside the track for rest periods to reduce extra walking.

At the end of the event all marbles are placed into a bin and each participant may submit one guess for the total; the closest guesses receive donated prizes. All participants receive a participation item. Cash donations collected at the event will be given to CMHA Regina Branch. Registration fees listed are CA$56.52 for the 3 hour, CA$67.38 for the 6 hour, and CA$78.24 for the 12 hour. Visit the organization's website for the most recent information.

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