La Laillyloise is a nature run held in Lailly-en-Val, located in the Loiret department of central France, centered on the village pond. This pond serves as the start and finish point for all participants. Adult and teen runners can choose from 7 km, 12 km, and 20 km distances. The 12 km and 20 km routes each include 200 meters of elevation gain, indicating that these longer courses involve more than just flat circuits near the water.
The routes traverse roads and forest trails surrounding Lailly-en-Val, a commune situated between the Val de Loire and Sologne regions. RUNNING LAILLY 45 is the organizing body, providing aid stations, changing facilities, and bib collection at the pond, along with multiple parking options for attendees. Younger participants are also included, with free, untimed 1 km and 2 km races available through on-site registration and parental permission. A portion of the race proceeds benefits the Téo Jasmin association, which supports individuals with developmental disorders.