The Trail des Terres de Saône, also known as TTS, is a trail-running race held in Port-sur-Saône, a town situated on the Saône River in the Franche-Comté region. The event takes place in November and provides five different route options, allowing participants to select multiple distances instead of competing on a single course.
The courses traverse hiking trails and off-road paths through the natural landscape surrounding the Saône area. One available option is a 22 km route with 400 m of elevation gain, classifying it as a short trail suitable for runners seeking a moderate challenge. The race has been held at least seven times, indicating its established presence.