Renfors Marathon is a charity running event held in Kajaani on September 19, 2026. The event’s proceeds support youth sports in Kajaani. The marathon’s start and finish area is at Raatihuone Square. The event route offers a stunning showcase of Kajaani’s most beautiful landscapes and attractions. Along the loop that follows the Kajaaninjoki River, you’ll encounter Kajaani’s castle ruins and magnificent river scenery.