Cold air can often mask the intense heat of the sun when trekking high altitude passes such as Kongmaru La or Bali Pass. At altitudes between 4000 and 5500 meters, exposure to sunlight is especially hazardous, potentially resulting in sunburn and other serious medical complications. We have witnessed how not recognising its dangers could result in sunburns and more serious medical conditions, such as altitude sickness.
Why Is Sun Exposure Worse at High Altitude?
Thinner Atmosphere- Stronger radiation results from less UV filtering.
Reflection off Snow & Ice: Up to 80% of UV rays may reflect off snow or ice and double your UV exposure.
Cool temperatures mask burns- Even though you might not feel heat directly on your skin, it’s still being cooked off.
Dry Air & Wind: Exposure to dry air and wind accelerates dehydration of skin cells and chapping.
Common Sun-Related Hazards for Trekkers
Sunburn: At high altitudes, sunburns of any severity may arise within 20 minutes and be visible on the neck, face and hands.
Snow Blindness: Cornea damage due to ultraviolet radiation causes snow blindness; symptoms include red and watery eyes as well as blurred vision or temporary blindness.
Dehydration: Even in cooler climates, sunlight can speed up water loss from our bodies when combined with dry mountain air and intense exercise.
Heat Exhaustion: Even during winter weather conditions, prolonged exposure to sunlight on clear days may result in dizziness, heatstroke and fatigue.
Trekup India's Sun Safety Strategy for Trekkers
- Utilise High-SPF Sunscreen SPF 50+ broad spectrum sunscreen is recommended. Apply the Sunscreen every 2 to 3 hours; this is particularly essential if you sweat a lot. Don’t forget to cover your neck, ears, nose and under the chin with protection from UV radiation.
- Wear Sunglasses Offering 100% UV Protection Wear sunglasses offering 100% UV protection with side covers (wraparound style is preferred). Glacier glasses are essential gear when trekking Brahmatal, Kedartal or Goechala in snow conditions. Avoid leaving the snow lights out in direct sunlight for even an instant, even for brief moments.
