The trek begins at Uttarey (6,500 ft) and
ascends to Chewa Bhanjang (8,860 ft) on the
Sikkim-Nepal border, where a police check post
exists on the Sikkim side. From thereon, the
trek route keeps between the altitude of 12,000
ft to 14,000 ft with the highest point being the
Dafey Bhir Pass located at an altitude of 14,450
ft high. The terrain along the trek route is,
therefore, treeless, criss-crossing, steep,
rugged rocky hills with grassy meadows forming
flat plains at places. Within the folds of these
fragile rocky slopes, one comes across several
high altitude lake formations of turquoise green
water considered pristine and sacred by both
Hindus and Buddhists alike. Among these lakes,
Ram and Laxhman, Lampokhari, Laxmi Pokhery and
Zomlay Pokheries are some of the well-known
sacred lakes, located along the main trekking
route. At places, the trail leads through the
rich rhododendron forests of many hues and
colors. The trek route after Gomathang valley
goes intermittently through forests of silver
fir and rhododendron right upto the alpine
plains of Dzongri.