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34,045EventsUnited States2026
Next week
20SAT
16
MAY
Harter Knochen Ultra
Ettlingen, DE
SAT
16
MAY
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Durmersheim, DE
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MAY
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17
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17
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Trail Alsace Grand Est by UTMB - 47 km 2026
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17
MAY
XVII. Römerlauf Obernburg
Obernburg am Main, DE
MON
18
MAY
La benfeldoise
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TUE
19
MAY
11. AOK Firmenlauf Pforzheim
Pforzheim, DE
WED
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FRI
22
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12. Ortenauer Laufnacht
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MAY
41. Straßenlauf
Riedstadt-Wolfskehlen, DE
Harter Knochen Ultra
Saturday, May 16, 2026 · Ettlingen, Germany
Distances
50km
Start location
About this race
The first Harter Knochen Ultra gathers nearly 20 running fanatics for a serious test. Expect rolling terrain on a 2 km loop with 100m elevation, repeated 25 times. This course has cult status, a true challenge for ambitious and professional ultra-runners.