Marceliński Bieg Letni is a 10 km trail run held mid-summer in Park Marceliński, Poznań. It offers local runners a chance to test their fitness within the city, providing a more relaxed atmosphere than a large road race.
The course consists of two loops on park paths, facilitating straightforward pacing. As it is not officially certified, it serves better as a training run than an opportunity for setting personal bests. The absence of vehicle traffic and the park environment ensure comfortable running conditions, and the event's modest size prevents crowding at the start. It is well-suited for individuals training for autumn street races seeking a break from routine road workouts.