1500 athletes arrived from 31 different countries from all over Europa to the Tata Olympic Centre in Hungary to participate at the 6. OCR European Championships between 8-11. June 2023.  The athletes had to deal with Running Warriors obstacles both at the short and the standard course (3 and 12 km), while in the case of the OCR100, the whole course was provided by the Running Warriors team.

Out of the Hungarian team (which was the second largest one, after the Italian, with its almost 300 athletes) László Strommer was the most successful, who defeated his European Champion titles both in Short and Standard course.