Head fro Switzerland and Vonnes Lake. The starting point is by the small chalet on the left shore of the lake, near the car park. You can also join the start of the walk by the shuttle bus from the center (Church square) to Vonnes Lake.
Take the path bordering Vonnes Lake, turn left onto a small road that follows the stream and takes you onto the main road (route départementale). Cross this road, take the path taht slopes gently upwards on the other side, and stay on it until yuo reach Morgins Pass (Col/Pas de Morgins). This is the Swiss boarder and you can go as far as the lake of the same name a short distance from the pass. You'll have a beautiful view of the Haute Cime in Switzerland, the highest peak in the majestic Dents du Midi massif (3,257m/10,686ft). If it is not covered by snow, the border marker is very intersting, with sculpted coats of arms on each of its faces ( the Swiss coat of arms on the one side and those of the Duke of Savoy of the other). Return by the same path. Otherwise, you can take the shuttle bus between Vonnes Lake adn Châtel.