Kręgi Mocy is a jubilee half marathon in northern Poland, covering the official 21.0975 km distance from the Stone Circles Reserve area in Odry to Piekarka Square in Czersk. This event is part of the RUN CZERSK series, commemorating the centenary of Czersk gaining city rights. It is designed as a small, organised road-and-trail race, not a large urban event, with a participant limit of 300 runners.
The course winds through villages in the Czersk municipality and forest sections before concluding in town. Approximately three quarters of the route is asphalt, with the remainder comprising crushed stone, concrete blocks, and YOMB slabs. Runners will find a mostly flat course with some localized inclines near Odry, Gotelp, Lubna, Malachin, and Czersk. The route is marked every kilometre, with aid stations approximately every 5 km. Buses transport runners to the start, and timing chips are affixed to race numbers. Finishers will receive a jubilee medal, water, a recovery meal, a clothing bag, and jubilee gifts. The regulations specify age groups and cash prizes for the top overall finishers.