The Helsinki City Marathon, established in 1981, is Finland's largest and oldest marathon event. Traditionally held in August, the race has been rescheduled to May and is now a highlight of the Helsinki City Running Day. The upcoming 45th edition is set for May 17, 2025.

The marathon course offers runners a scenic tour of Helsinki, featuring beautiful sea views and a finish at the iconic Helsinki Olympic Stadium. Participants will experience a mix of seaside vistas, park landscapes, and urban settings, providing a comprehensive view of the city's charm.

The event typically attracts around 20,000 runners from over 80 nations, contributing to a vibrant and international atmosphere. The race time limit is set at 6 hours, accommodating runners of various paces.

May temperatures in Helsinki are generally mild, offering comfortable conditions for marathon running. Participants can look forward to a well-organized event that showcases the best of Helsinki's natural beauty and urban appeal.