Day 1: Dehradun to Sankri - 8 h drive
Day 2: Sankri to Osla (2,700 m) - 1 h drive + 5-6 h trek
Day 3: Osla to Kalkatidhar (3,300 m) - 3 h
Day 4: Kalkatidhar to Har ki Dun (3,510 m) & Marinda Tal (3,794 m)- back to Kalkatidhar
Day 5: Kalkatidhar to Osla - 3 h
Day 6: Osla to Sankri - 4-5 h trek + 1 h drive
Day 7: Sankri to Dehradun - 8 h drive