Standard 12-Day Itinerary Day 1: Dehradun → Sankri (1,920 m) – Drive & overnight guesthouse Day 2: Sankri → Taluka → Osla (2,500 m) – Trek begins Day 3: Osla → Ruinsara Tal (3,500 m) – Meadows & lake views Day 4: Rest / Acclimatization at Ruinsara Day 5: Ruinsara → Base Camp (4,300 m) – Glacier approach Day 6: Load ferry to Advanced Base Camp (ABC) Day 7: BC → ABC (5,000 m) ... https://www.thinairexpedition.com/black-peak-expedition/