I found more information about the Golf Course from armyzonegolf.com which i would like to share off:
The ‘Yak Golf Course’ was started on 19 Sep 1972 at Kupup. The course was re-designed in 1979 by Brig JM Singh, Cdr 164 Mtn Bde and since then it has been developed into one of the finest by Avid Golf Lovers. As on date under the guidance of Brig Ranbir Singh, Cdr 63 Mtn Bde and Col T K Murali, Dy Cdr 63 Mtn Bde the course is been redesigned and expanded to 18 holes.
Kupup, located at an Altitude of 13,054 feet above mean sea level in East Sikkim boasts of a eighteen hole golf course ‘The Yak Golf Course’ which is the highest in the world. It rivals the very best for its beauty and picturesque surroundings.
The Yak Golf Course managed by the Indian Army is Affiliated to the Indian Golfers Union since 1992. Our IGU Membership No is 0245 (E). The course is open to golfers round the year subject to snow conditions. However, it is generally playable from May to Dec. The course has challenging fairways meandering across mountain streams in their full flow and teasing browns which test the golfing skills of one and all.
Nearest Airport is Bagdogra (WB) and the Nearest Railway Station is New Jalpaiguri (WB). From Bagdogra/New Jalpaiguri/Siliguri it is a three hour drive by road to Gangtok, from where it takes about two hours by road to reach Kupup.
The club is open seven days a week. During winter, the golf course remains active with ‘Ice Hockey’, ‘Ice Skating’ and ‘Skiing’ being the main attractions. Besides these there is a Croquet Course and facility to play Baseball within the club.
The World’s Highest playing 18 Hole course, with meandering streams traversing the course, and the mighty Himalayas in the background.
The Golf Course is spread over 4,978 yards with 18 holes on 18 browns and numerous bunkers.
Fairways/No of Hazards/Local RulesThe fairways are lush green with natural streams and ponds as hazards, which makes the game interesting and challenging. Due to the natural lay of the ground, preferred lie is permitted to avoid damage to the clubs as well as to complete the course within the given score of 72.