Day 1: Gangtok -Lachen
Day 2: Lachen - Talem
Day 3: Thalem - Jakthang
Day 4: Jakthang - Yabuk
Day 5: Yabuk- Rest Camp
Day 6: Rest Camp - Greenlake
Day 7: Green Lake -Yabuk
Day 8: Yabuk - Jakthang
Day 9: Jakthang - Thalem
Day 10: Thalem - Lachen
Day 11: Lachen - Gangtok

Duration -  10 Days
Best Season - 

Day 1 : Gangtok -Lachen ( 2728 m - 6 hrs drive)
Day 2 : Lachen - Talem ( 3237 m - 4 hrs)
Day 3 : Thalem - Zakthang (3429 m - 4 hrs)
Day 4 : Zakthang - Yabuk (3978 m - 5 hrs)
Day 5 : Yabuk- Green Lake (4934 m - 6 hrs)
Day 6 : Greenlake (halt)
Day 7 : Greenlake - Yubuk ( 6 hrs)
Day 8 : Yubuk - Talem
Day 9 : Talem - Lachen ( 5 hrs)
Day10 : Lachen - Gangtok 

Main peak around green lake are Mt Siniolchu, Mt Simvo, Mt Khangchendzonga, Twin Peak, Mt Nepal Peak, Mt Tent Peak, Mt Kabru North.