Dear Pankaj Ji,
It is possible to do the Darma Gangotri Trek (some part by road) but it will not be a single trek but a trans himalayan high altitude expedition crossing many passes.
From Darma one have to reache Sepu the last village & croass a pass to enter the trek Milam & from Milam one have to cross Untadhurra pass and Khingar pass to enter Gahrwal (Malari side). Army used the pass regularly & this trekking area passes thru' a very hotly contested border region, Hence 'sensitive'. And it's quite easy to get lost into Tibet. Even if you got the permits, you can be denied entry into this region by local military and police
You have to obtain permission from both the DM's at Gopeshwar for this side and from Pithoragarh for the other side not to mention Camera permits also.
Trek 1 Dharchula-Dar-Bongling-Sela-Baling Baling-Dagtu-Son-Panchchuli Base Camp-Tidang – Sepu- Pass & will enter Milam valley
Trek 2
Milam Glacier- Dunga- Parital- Untadhurra Pass- Topidhunga- Khingar Pass- Lamthal- Malari
(Topidunga-Chadmu-Lapthal-Sumna stretch is disputed by China as their territory)
A lady called Vineeta Muni have done an incredible seven-month expedition across the Himalayas. She was part of an eight member women's team: "Indian Women's First Trans Himalayan Journey 1997".
http://www.indiatravelogue.com/adve/moun/moun8_3.htmlLink to map for trek
http://wikimapia.org/#lat=30.6281634...13&l=0&m=a&v=2link to desciption of the terrain and the actual trek
http://books.google.com/books?id=GQr...result#PPP1,M1Advice by Harish Kabadia (a well known mountaineer) for the trek
The Malari-Unta Dhura-Milam trek is beautiful. Not great difficulty at all as there is a beaten path which is even fit for mules. ITBP keep moving on the area. That brings us top main difficulty-- ITBP itself ! The permits can be obtained from Gopeshwar to start but they do not issue permits for photography. ITBP makes big fuss over it and has asked people to deposit cameras and even mobile phones with camera! It becomes difficult to collect these cameras in case of a circular trip like this. So try and use some contact (only that works in India!) to sort this if you can.
Trek 3
Kalindi Khal Trek- Badrinath to Gangotri
Badrinath- Mana- Ghastoli- Arwatal- raj parao- Kalindi khal- Kalindi base- Sweta glacier- khara pathar- vasukital- nandanwan- Tapovan- bhojbasa- gangotri
This is high altitude Trekking, Moraines, Glaciers, Glacial Lakes, Mountains & Pinnacles! Sheer rocks, but clad with snow and Ice and they are most beautiful of all Himalayas
you shall trek through the biggest Himalayan amphitheater of very famous mountains, some of the major peaks you shall be viewing are – Nilkanth (6597 Mts.), Meru (6672 Mts.), Kedarnath Peak (6940 Mts.), Kedar Dome (6831 Mts.), Bhagirathi I, II & III (6856 – 6455 Mts.), Satopanth (7075 Mts.), Chaukhamba (7138 Mts.), Sri Kailash (6932 Mts.), Kharchakund (6617 Mts.), Vasuki Parbat (6792 Mts.), Mana Parbat (6794 Mts.), Bhrigupanth (6771 Mts.) and many more
(i never heard that someone have done Badri- Gangotri trek,but it is Gangotri Badri Trek is done)
Note: Inner line permit is required for all the treks
Atleat it will take a month or so to complete the trek
Fitness standard of the trekkers should be very very high
One have to search for the best Guide & porters who already have done this trek
If any one/ any trek fails the whole expedition will go on toss
For Kalindi Khal trek Satellite phone is compulsory
The cost of the total expedition will be very high