Ladakh Umlingla Challenge 2026

1. Registration and Preparation ​•Registration Opening: December 16, 2025.

•Medical Readiness: All participants must secure a Medical Fitness Certificate signed by a certified practitioner. This is a non-negotiable requirement for participation.

•Slot Availability: The event is strictly limited to 100 runners across all categories to ensure safety and environmental sustainability. ​

2. Pre-Race Mandatory Phases (Leh) ​•Arrival in Leh: Recommended by July 1, 2026. ​

•Bib Distribution & Initial Medical Screening: July 1, 2026. Runners must be present in person for SpO2, BP, and heart rate checks. No bibs will be issued after this window. ​

•Leh Acclimatization Period: July 3 to July 7, 2026. Runners are required to stay at 3,500m to adapt to the thin air. Note: Accommodation and food during this specific week are not included in the registration fee.

•Group Departure: July 8, 2026. All runners and the Sarmang team travel together from Leh to Koyul (4,200m). ​

•Base Acclimatization: July 8 and July 9, 2026. A two-night stay at the base station (included in the ticket for Indian citizens) for final high-altitude adaptation.

•Final Medical Clearance: A secondary screening at Koyul to ensure athletes are fit to start at extreme altitudes. ​

•Start Time: 4:00 AM (IST) onwards. ​

•The Course: Starting at Umling La Top (5,799m) and descending through the Himalayan cold desert. ​

•Race Categories:

°70K Ultra: 14-hour cut-off. ​

°50K Ultra: 10-hour cut-off. ​

°Full Marathon (42.195K): 8-hour cut-off.

°Half Marathon (21.0975K): 4-hour cut-off.

°10K Run: 2 hours 15 minutes cut-off. ​

•Closing: Post-race meal at Koyul and finisher medal distribution. ​

•Return Journey: Organized transport back to Leh after the event. ​

The Ladakh Umlingla Challenge is the flagship event of the "Summit or Surrender" extreme altitude series. Recognized by the Guinness World Records, it is widely considered the toughest road running challenge on the planet. Situated at an staggering altitude of 5,799 meters (19,024 feet), runners face a landscape where oxygen levels drop to nearly 40% of sea level and temperatures can plummet to -15°C. ​

•Organizing Body: Sarmang Society / Sarmang Adventure Tours 

•Race Director: Anil Mohan •Headquarters: Dehradun, Uttarakhand, India

Primary Contact Details: ​

•General Inquiries: info@sarmang.com ​

•Registration Support: run@sarmang.com ​

•Partnership/Sponsorship: marathon@sarmang.com ​

•Direct Phone/WhatsApp: +91 9997580862 ​

•Official Website: https://ladakhumlinglachallenge.sarmang.com ​