Tibet is probably the only destination among the Himalayas that's not as known for its adventure circuits as the rest are. But do not underestimate this destinations as just another trans-Himalayan area of the Himalayas. There's much more to Tibet than Buddhism, monasteries and cold desert-like weather.

Tibet's high altitude and the atmosphere allow the sun's solar radiation to strike the earth with unusual intensity. To protect your eyes and skin, you'd better to bring the sunscreen, which with a sun protection factor of 15 and sunglasses are also useful. And lip creams and balms are also sold with SPF ratings, zinc, oxide creams provide 100% block out. Generally from April to October is the best season for opting a Tibet tour. But it really depends on your route and a normal winter Tibet tour schedule is quite comfortable, because in winter, the tourist rush is not much and you can enjoy the beautiful scenery freely.
Everest Region:
Usually Everest is more known as a part of Nepal and trekkers have explored numeorus trek routes towards this world's highest peak from Nepalese Himalayas. Still, if you like trekking in the unexplored zones then opt the routes to the Everest range from the Tibetan Himalayas side. One Everest trek tour option from Tibet is from Kathmandu drive across beautiful Nepalese countryside to the Chinese boarder town of Zangmu before negotiating the road up through the deep gorges of Sunkoshi River to Tingri. Trek past the ancient village of Tingri to the base camp from where one can see the magnificent and huge dimensions of Mt. Everest. Kailash Mansarovar Yatra:
For well over a thousand years, pilgrims have journeyed Kailash Mansarovar to pay homage to the mountain’s mystery, circumambulating it is a ancient ritual of devotion that continues to this day. People have been visiting Kailash - Mansarovar for centuries. Almost all the major passes of Uttaranchal Himalayas lead to Kailash - Mansarovar. The important ones in the Kumaon region are Lipulekh, Lampiya Dhura, Nuwe Dhura, Lowe Dhura, Unta Dhura, Jayanti and Kungri Bingri. Under the administration of the Indian ministry of external affairs and with the cooperation of the Chinese government, Kumaon Mandal Vikas Nigam has been conducting trips to Kailash - Mansarovar through the Lipulekh pass. Namchag Barwa Trek:
Namchag Barwa is an excellent short trek for nature lovers and amateur botanists. It includes the delightful Nyima La and the lushly forested Rong Valley. The route begins in Pei, a small village that is also the staging post of treks to the great bend of the Tsangpo via Pelma Kochung and to Metog. Here a ferry crosses to Timpe on the north bank of the river, site of a revered Guru Rinpoche cave and monastery.

A splendid trail leads north to the Nyima La through some of the finest virgin forests and flower gardens in southeastern Tibet. The idyllic walk passes a nomad camp and groves of flowering rhododendrons along the way. Many plant species abound on the open moorlands near the pass. From the pass there are tremendous views of the Assam Himalayas, including nearby Gyala Pelri and Namche Barwa. On the far side of the Nyima La is the Rong Valley, a heavily forested scenic valley that is luxuriantly carpeted with primulas and violet irises from May to July. The best time for this trek is from May to October.

Trekking Permits In Tibet
There are two requirements for foreign tourists tour in Tibet. One is the Chinese Visa, which you can apply for in Chinese Embassy in your place. Another is the Alien' Travel Permit, which issued by Tibet Tourism Bureau. There are no independent trek tours allowed in Tibet. You should join an organized group or have the local travel operator arrange a trek tour for you. High Altitude Sickness could happen to any guest in high altitude. The effect of HAS usually remains 2 days till the body acclimatizes. Headache, nausea, vomiting and short breath are the common symptoms. To avoid HAS take garlic soup, more water frequently. Diamox tabs are also recommended.