Here is the annual cycle race, which passes through Oberursel every year on 1st May, passing the Camp King level crossing on the Hohemarkstraße:
Eschborn-Frankfurt Cycle Race 2024
Each year on 1st May (Maifeiertag), the cycle race “Eschborn-Frankfurt” passes though Oberursel and past Camp King:

Eschborn-Frankfurt Cycle Race 2022
The Eschborn-Frankfurt Cycle Race returned to the 1st May bank holiday this year. Here is the elite race passing Camp King in Oberursel: