Thorong La Pass vs Kongma La Pass: Which Himalayan Trekking Pass is Harder? www.treklanders.com Thorong La vs Kongma La Pass | Difficulty, Altitude & Trekking Comparison Guide Compare Thorong La Pass and Kongma La Pass in Nepal with this detailed trekking guide. Learn about altitude, difficulty, terrain, acclimatization, safety, weather, mountain views, and which Himalayan pass is best for your adventure.