The document provides information about the Chadar Trek in Zanskar region of Ladakh, India. The Chadar Trek involves walking 10km on the frozen Zanskar River with water flowing beneath the ice. It takes place over 10-14 days depending on the organizer. Temperatures range from -10C to -25C. The organizer is listed as www.chadartrek.com. A package for 26,000 INR covers accommodations, meals, permits, equipment, medical kits, oxygen, transportation, and guide/support staff. Additional costs include approximately 7,000 INR for flights to/from Leh, 2,000 INR for accommodations in Leh, and 10,000 INR for personal trek