Trekking tour packages, skiing tours, climbing tours and hiking tours in India are designed for the adventure enthusiasts. The imposing snow-clad Himalaya range provides thrilling skiing, expedition routes as well as opportunities for other adventure sports such as rafting, climbing and trekking. The main attraction of the summer season in the states of the Himalayas is trekking and climbing. Hikers without any prior experience can easily manage the altitudes range from 2500 to 4000 meters above sea level in the mountainous regions of Jammu and Kashmir, Himachal Pradesh, Uttarakhand and Sikkim. In Ladakh, the Nun Kun massif, the Zanskar group of the Central Himalayas, Arunachal Pradesh, Nanda Devi, Kamet and Dunagiri offer mountaineering peaks. Winter sports in India are centered around the Himalayas in the states of Kashmir, Uttarakhand and Himachal Pradesh. Ski usually starts at the end of December and lasts until the end of March. Gulmarg in Kashmir, Auli in Uttar Pradesh and Manali in Himachal Pradesh offer good ski slopes. Heli skiing in Manali and Gulmarg offers enormous varieties of trails and itineraries.