The Eugeniusz Tyrajski “Sęk” Memorial Relay is a short family race in Warsaw’s Mokotów district, held in Park Promenada–Morskie Oko in October. It includes a three-person family relay over 1,944 metres and a separate Memorial Run over the same distance.
The race honors Lieutenant Colonel Eugeniusz Tyrajski, who used the pseudonym “Sęk.” The 1,944-metre distance connects the run to wartime memory. The Mokotów District Office organizes the event, which is described as the seventh Family Memorial Relay, suggesting it is a local residents’ race focused on families rather than a standard road-racing event.