Lidingöloppet is an annual cross country running competition held in Lidingö, Sweden.

The 30 km run has about 15,000 participants per year and the shorter races several thousands, making it the largest cross-country event in the world.

The initiative to arrange Lidingöloppet came from Karl Axel Karlberg and Sven Gärderud but the original idea to have a large competition for the average jogger comparable with Vasaloppet for cross country skiers, came from the sports magazine journalist Sven Lindhagen.

It is a tradition that long distance runners studying at Bosön sports training and education center participate at Lidingö.

Tata Consultancy Services, a major IT company from India, is currently the primary sponsor of this event.