Now in its 10th year, the Muckno Mania Triathlon is a staple of the Festival.  The event sees the Black Island, which stages the event, come into its own, hosting professional and amateur athletes alike.  The course consists of a 750km swim in Lough Muckno, 18km cycle around the lake and a 5km culmination run through the forest.

In addition to those competiting as individuals, the Muckno Mania Triathlon encourages people to participate in teams and relays.