From July 16th to 18th, 2021, the Rotax MAX Challenge Euro Trophy made its debut in the Arena E at Mülsen (GER). For the first time, the European RMC elite visited the 1,315 metre-long circuit in Eastern Germany, where the third and penultimate round of the season heralded the crucial phase of the series. The weather was mixed; after sunshine on Friday, the heats took place in rainy weather before the final day was dry again.