The Diezer Stadtlauf is a 10 km street run starting from the market square in Diez, Germany, held in late September. This edition also functions as a regional district championship, adding a competitive local title to the standard city-run atmosphere.
Organized by SV Diez-Freiendiez, the event features races beginning in Diez, with shorter distances available. In addition to the 10 km, there are 5 km street races for various age groups and a 400 m race for younger participants, ensuring a broad range of competitors. The categories include children, youth, open runners, and masters, with distinct male and female divisions extending to older age brackets.