Terres d’O is an orienteering club based in the western Vosges region of France. The club introduces participants to the area’s forests and outdoor terrain through organized orienteering events, including middle-distance races and multi-day competitions. Its activities bring together people of different experience levels, with event reports noting participation by local runners and visitors. Terres d’O also shares competition results and information to help participants follow events and prepare for future training.

The club’s events make use of locations such as the forest of Darney-La Vôge, recognized with the Forêt d’Exception label in July 2024. In 2025, Terres d’O welcomed participants to this forest for three days of orienteering and introduced two terrains similar to those planned for the French Championships later that year. The organization also highlights local landscapes and works in a regional context involving municipalities, the intercommunal authority, and the French National Forest Office. Through its events and updates, Terres d’O promotes orienteering and discovery of the Vosges countryside.