T1D 48-Mile Challenge
Humboldt, Canada • 5-7 Jun 2026
T1D 4x4x48 Ultramarathon
The T1D 4x4x48 is an annual weekend event in Humboldt, SK, scheduled from Friday June 5 to Sunday June 7, 2026. It is the sixth edition and its purpose is to support research toward a cure for Type 1 Diabetes and to raise awareness for those living with the condition. The beneficiary organization named is DRIFCan and past editions have raised over $372,000 for cure-based research.
The 4x4x48 format requires athletes to run 4 miles every four hours over a 48 hour period, which amounts to twelve runs of 4 miles for a total of 48 miles across the weekend.
Weekend activities include a Friday night banquet with entertainment and live and silent auctions, Saturday events such as a free breakfast provided with Tim Horton's and the local Special Olympics team, a Super Hero Run and a themed night run with glow elements. Sunday features a community walk and a free A&W BBQ lunch while the ultramarathon team completes the final leg.
The route follows a wilderness trail in the Humboldt area. Participation options described include running the full ultramarathon, running or walking an individual leg, or supporting the event through donations to the research fund. Visit the organization's website for the most recent information.