Yesterday I participated in the 12 hour Urban Photo Race in Utrecht, The Netherlands.
The UPR is a photo marathon. Participants are asked to make 6 series of photos based on themes that were disclosed on the day itself, walking through the city along given checkpoints within a certain timeframe. For the UPR it means one needs to make a series of 3 photos per theme and deliver their photo selection at the end.
More info here: https://www.urbanphotorace.com
