T1D 48-Mile Challenge
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Event overview
The T1D 4x4x48 Ultramarathon is the sixth annual edition held in Humboldt, Saskatchewan from Friday June 5 to Sunday June 7, 2026. The format is a 4x4x48: athletes complete 4 miles every 4 hours over a 48-hour period, for a total of twelve 4-mile runs and 48 miles overall. The route uses a wilderness trail in the Humboldt area.
Purpose and program
The event raises funds and awareness for Type 1 Diabetes research and community support. Over the past five years the event has raised more than $350,000 to support cure-based research through DRIFCan, an Edmonton-based organization that funds diabetes research. Weekend activities include a banquet with live and silent auctions, a community walk with a free A&W BBQ lunch, a breakfast supported by Tim Hortons and the Humboldt Special Olympics Team, themed evening runs and other community activities. Participants may complete the full ultramarathon, run or walk individual legs, or support the event through pledges and donations. Visit the organization's website for the most recent information.