La Corsa della Bora is S1 Trail’s winter trail-running event, held on 9–10 January 2027 across the Italian and Slovenian Karst near Trieste, with a finish at PortoPiccolo. Bringing together running, local culture and nature, the event invites participants to experience a borderland of coastal paths, forests, rocky terrain and historic First World War trails. Its seven distances range from the 4 km Borin to the 116 km Bora Ultra, with options including the Family Hike & Trail, Half Trail, Borderless Trail, TransKarst and Trieste Ultra.

Routes cater to different abilities and ambitions, from a relaxed scenic outing to a demanding ultra-distance challenge. The course changes each year; the 2027 edition is presented as featuring entirely new routes. Participants can find event information, registration details, travel guidance, accommodation, the programme and family activities through the event’s website.

The site also describes flexible registration changes and cancellation options, plus locally sourced Karst foods at aid stations