Ultras in December 2026

24 upcoming ultras happening worldwide in December 2026. Filter by country, exact distance, or elevation.

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10K races in DecemberHalf marathons in DecemberMarathons in December

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This calendar in numbers

This calendar currently lists 24 upcoming events, from Dec 1, 2026 to Dec 31, 2026. December is the busiest month, with 24 events scheduled. Events are spread across 22 different locations; Bariloche hosts the most (2). Course distances range from 44 km to 418.4 km.