Backyard Ultra 100 Jezior2026
17.10.2026Ślesin (Poland)
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1 course · 6.7 km
1 course
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The race
Backyard Ultra is the simplest and most demanding running format in the world. The rule is one: every hour you start a 6.706 km loop. You must finish it before the next hour expires.
Where to stay
Find a place to stay near Ślesin for the race.
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