Marthomis is located in the game reserve of the Haut Languedoc. It's a protected game reserve, low populated and not very touristic. Nevertheless it's a beautiful place for hiking and cycling excursions.
Near to the village you can visit the caves of the Devèze or go to the golf court in Mazamet.
For the necessary goods, you have to go to Saint-Pons, about 8 kilometers away from Marthomis.