AnchorageHikes.com › Gear

Sun Protection for Alaska Hiking (Yes, You Need It)

Thinking about sun protection for Alaska hiking might seem counterintuitive. Our image of Alaska often involves glaciers, snow, and long winters. While that’s true for much of the year, summer in Alaska brings incredibly long daylight hours – and with them, significant sun exposure. Ignoring sun protection here isn’t just uncomfortable; it’s a safety oversight that can lead to sunburn, heatstroke, and long-term skin damage. This guide outlines why, what, and how to protect yourself on Alaska trails.

The Alaska Sun: What Makes It Different?

Two main factors make Alaska’s summer sun uniquely potent:

• Extreme Daylight Hours: During peak summer (June-July), Anchorage sees nearly 19 hours of daylight, with twilight extending even further. This means your exposure window is vastly longer than in lower latitudes. A “short” afternoon hike can still mean hours under direct sun.
• Angle of Incidence: While the sun never gets directly overhead, the low angle means UV rays travel through more atmosphere, but they still pack a punch. More importantly, the low angle means the sun can be in your eyes and on your face for much longer stretches, especially on open ridge lines or near water.
• Reflective Surfaces: Snowfields, glaciers, and even water bodies (lakes, rivers, coastal areas) reflect UV radiation, effectively doubling your exposure. Many popular Alaska trails involve crossing or skirting these features.
• Higher Elevation (Interior/Mountains): While Anchorage itself is near sea level, many iconic Alaska hikes take you into alpine environments where UV intensity increases significantly with altitude. For every 1,000 feet of elevation gain, UV radiation increases by approximately 10%.

Essential Sun Protection Gear for Alaska Trails

Don’t leave home without these items, even on cloudy days. UV rays penetrate clouds.

• Sunscreen (SPF 30+):
  • Broad-spectrum: Protects against both UVA and UVB rays.
  • Water-resistant: Essential for sweating, light rain, or near water.
  • Application: Apply generously to all exposed skin 15-30 minutes before heading out. Reapply every two hours, or more often if sweating heavily or in water. Don’t forget ears, neck, and the backs of your hands.
• Lip Balm (SPF 15+): Your lips are highly susceptible to sunburn. Carry an SPF-rated lip balm and reapply frequently.
• Sunglasses:
  • UV400 or 100% UV Protection: Crucial for protecting your eyes from long-term damage (cataracts, macular degeneration) and immediate discomfort.
  • Wraparound style: Offers better peripheral protection, especially useful for glare off snow or water.
  • Polarized: Reduces glare, improving visibility and comfort, particularly on sunny days near water or snow.
• Wide-Brimmed Hat:
  • Brim at least 3 inches: Protects your face, ears, and neck. A baseball cap only protects your face.
  • Chin strap: Essential for windy Alaska ridgelines.
  • Ventilation: Look for hats with mesh panels to prevent overheating.
• Sun-Protective Clothing (UPF Rated):
  • Long-sleeved shirts and pants: Your best defense. Look for lightweight, breathable fabrics with a UPF (Ultraviolet Protection Factor) rating of 30 or higher. Many outdoor brands offer excellent options.
  • Light colors: Reflect more sunlight and keep you cooler than dark colors.
  • Neck gaiter/buff: Versatile for protecting your neck, face, and ears. Can be dipped in water for cooling.

Practical Tips for Alaskan Trails

• Don’t Underestimate Cloudy Days: UV rays penetrate cloud cover. You can still get a severe sunburn on an overcast day.
• Layer Up: Even on sunny days, Alaska weather can change rapidly. Wear your sun-protective layers, but have warmer layers in your pack.
• Hydration: Sun exposure and physical exertion increase fluid loss. Carry plenty of water and drink regularly to prevent dehydration and heat exhaustion.
• Early Morning/Late Evening Hikes: While the sun is always present, the UV index is generally lower earlier in the morning and later in the evening. This can be a good strategy for longer hikes.
• Seek Shade (When Available): Utilize tree cover or rock formations for breaks, especially during the brightest parts of the day.

Beyond Sunburn: Other Sun-Related Concerns

• Heat Exhaustion/Heatstroke: While less common than in hotter climates, prolonged exertion in direct sun, especially when dehydrated, can lead to these serious conditions. Symptoms include heavy sweating, weakness, dizziness, nausea, headache, and confusion. Seek shade, hydrate, and cool down immediately.
• Snow Blindness (Photokeratitis): If hiking on snowfields or glaciers without proper eye protection, the intense UV reflection can cause temporary but extremely painful damage to your corneas, similar to a sunburn in your eyes. Always wear 100% UV protective sunglasses.

Don’t let the “cool” image of Alaska fool you. The summer sun demands respect and thorough preparation. By integrating these sun protection strategies into your gear and routine, you’ll ensure your Alaska hiking adventures are safe, comfortable, and memorable for all the right reasons.

← AnchorageHikes.com — Alaska’s #1 Hiking Resource

Frequently Asked Questions