Polonika Retro Rajd Rowerowy guides participants on bicycles manufactured before 1995 along a 150-kilometer circuit starting in Mielnik, incorporating manual river crossings via ferry over the Bug River. Organizers state this is the sole event of its nature in Poland. The schedule also features a retro time trial within Mielnik, emphasizing speed with vintage bicycles rather than solely their exhibition. Participants require a functional vintage bicycle and must wear a helmet.
The primary route crosses locations such as Zabuże, Klimczyce-Kolonia, Korczew, Drohiczyn, Wiercień Mały, Milejczyce, Nurzec-Stacja, Jasienówka, and Hornowo before concluding back in Mielnik. A refreshment point at the historic Palace in Korczew offers participants a pause and local fare, including potato sausage. Enthusiasts of vintage cycling travel from throughout Poland and internationally. Local residents along the course are encouraged to support cyclists attired in historical clothing. The broader weekend activities align with the WERTEP Theatre Festival on Mielnik Market Square and an event at Uroczysko Topolina.