We did TSUM VALLEY TREK with Third Rock Adventures. Our guide Rishi was an amazing person to deal with. He was too experienced for this trek. He knew every little detail and could decide instantly. My brother had a small injury, and his decision for taking rest and medical assistance was prompt. He was friendly and astute. Every day, we experienced new things, met new people, and enjoyed the warm hospitality. It was a great trek and a wonderful experience.