Rundstrecken Challenge Nürburgring

For many years, the series was sponsored by Castrol and HAUGG (a company owned by a race driver, providing car parts like radiators).

Most RCN events are held on the Nürburgring, mainly on the 20.832 km long Nordschleife version, on Saturday afternoon following a Gleichmäßigkeitsprüfung (GLP) run by the same organizing club.

As season highlight in front of thousands of spectators, the RCN usually runs on the Thursday before a 24 Hours Nürburgring race, which is a holiday, either Ascension Day or Corpus Christi (feast).

Of the remaining 11 laps, 9 are run at full speed (like a special stage in rallying), with each second counting as one penalty point.

In wet conditions, these laps can decide the winners, as they can add a significant amount of penalty points to the tally.