The 17.89 km de Crosne is a running event held in Crosne, France, each September. It features adult races of 5 km, 10 km, and approximately 21 km. The longest distance is officially listed as 20.89 km and is in its second year, indicating it is a developing local event. Adult races begin in the morning, with the longest distance starting first, followed by the 10 km, and then the 5 km.
The course combines town streets with natural areas. Runners will navigate road sections, including Rue Remonteru, before entering the Bois de la Grange for the nature portion. The event accommodates various age groups, with minimum ages set at 13 for the 5 km, 15 for the 10 km, and 17 for the 21 km. Children can participate in free races of 700 m, 1,500 m, and 3,000 m, suitable for ages 6 and up. Bib collection takes place at Stade Henri Hurt.