is described in 14 day stages, with optional variants, and is suitable for walkers with a good level of fitness and some previous alpine trekking experience. Alongside clear route descriptions and mapping for each stage of the trek, there is essential practical information on travel to Chamonix and return from Zermatt, as well as advice on accommodation in alpine villages and mountain refuges, trekking safety, equipment, itinerary planning and preparation. Taking 2 weeks to complete, this challenging but rewarding trek encompasses views of the greatest collection of 4000m peaks in the Alps - Mont Blanc, the Grand Combin, Dent Blanche, Weisshorn and the Matterhorn - and visits some of the most spectacular valleys, including the Val d'Herens, Val d'Annivers and the Mattertal.