5 km, one lap around the Vienna Ringstrasse boulevard at night Start: Universitätsring, on the level of the Vienna University, main building start is in 4 starting blocks from 20:15

On September 19, 2023, more than 16,000 runners are expected to take part in the nightly circumnavigation of the ring. Those who take part in the race are actively doing something against climate change and helping to grow a mangrove forest in Myanmar.