Ski Classics is a series of long-distance cross-country ski races in classic style that has been held since 2011. In season XII, 2021–2022, the circuit included 15 events, in a professional tour for the 35 Pro Teams involved. From 2015 to 2022, the official name of the circuit was Visma Ski Classics, thanks to their main sponsor. The special thing about the Ski Classics concept is that anyone can start the races: professional or amateur, male or female, 25 or 75 years old. Everyone stands together on the same starting line to face the same weather conditions and the same course.
https://en.wikipedia.org/wiki/Ski_Classics