The 12+24 Hour Race Basel is an Ultramarathon race in Basel, Switzerland. The run takes place annually in May, organised by the Sri Chinmoy Marathon Team. It is held on the Sports Facilities St. Jakob on a 1,1 kilometer route.
Since 1988 the race has been held in Basel. It regularly holds the 12 and 24 hour Swiss championships, and has held the European Championships several times .
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