While they’re certainly one of the biggest draws of the city, Boulder’s pristine trails offer more than just breathtaking views. In a previous article, we talked about how Boulder’s various terrains make for excellent hiking adventures, an activity that offers great cardiovascular benefits as well as relief from symptoms of stress and anxiety. However, before you lace up your boots and set out to reach Mount Sanitas’s summit, first you’ll need to take a few precautions — particularly for sun safety. Below, we’ll explain why and outline key sun protection essentials that hikers can’t go without.

The dangers of UV exposure for hikers

Boulder’s elevation of around 5,340 feet above sea level exposes hikers to higher levels of UV radiation. At higher altitudes, the atmosphere is thinner, providing less filtration of UV rays from the sun. According to the World Health Organization, UV radiation increases by about 10% to 20% for every 3,300 feet above sea level. Consequently, hikers in Boulder are at greater risk of UV exposure compared to those at lower elevations.

Sunburn and sunlight exposure are the main factors for skin cancer. In a study that examined the ultraviolet sun exposure and sun protection behaviors among outdoor rock climbers, researchers found that the sunburn rate was as high as 65.9%. Hikers are exposed to similar environmental factors, meaning that their risk of skin cancer could likewise be extremely high.

In addition to sunburn and skin cancer risks, intense sunlight exposure can damage the eyes and lead to cataracts, macular degeneration, and pterygium (a growth on the eye’s surface). Skin and eye damage from UV rays are largely avoidable if certain precautions are taken, which we’ll go through next.

UPF clothing

One of the easiest ways to shield yourself from the sun is by wearing sun-protective clothing during hikes. Clothing that comes with an ultraviolet protection factor (UPF) rating of at least 50 blocks as much as 98% of damaging UV rays from reaching your skin. Moreover, they consistently block UV rays, regardless of factors like sweating or water exposure. The comfort and breathability that UPF clothing like the REI Co-op Sahara Shade Hoodie provide hikers are also a good bonus. In Boulder, temperatures can vary, and physical exertion can lead to increased perspiration. UPF clothing allows hikers to stay protected from UV radiation without feeling overheated or uncomfortable.

Sunglasses

As we mentioned above, hikers are vulnerable to eye damage when spending prolonged periods outdoors under the sun. To mitigate this, high-quality sunglasses that offer 100% UV protection are a must. Oakley’s Fuel Cell or The Bird sunglasses from Maui Jim are both ideal for hikers, as they offer total sun protection with their wraparound styles. On top of blocking 100% of UV rays, these models are also equipped with polarized lenses that reduce glare and enhance contrast, allowing hikers to see more clearly and navigate their surroundings safely. Lastly, both models are crafted specifically for outdoor adventures, featuring lightweight and durable materials that guarantee comfort for extended hikes.

Sunscreen

Colorado-based dermatologist Dr. Gregory Papadeas cites that the increasing popularity of outdoor activities such as hiking has led to escalating skin cancer diagnoses in his practice, stressing the importance of sunscreen. For hikers, he recommends applying broad-spectrum mineral sunscreens with an SPF of at least 30. However, for high-altitude hikes, sunscreen with SPF 50 or 70, like the Blue Lizard Sensitive SPF 50+ Mineral Sunscreen Lotion, offers better protection. Importantly, sunscreen must be reapplied every two hours in order to harness its sun-protective benefits.

UV exposure poses significant dangers for hikers, including sunburn, skin cancer, and eye damage. By taking proper precautions and arming themselves with the essentials above, hikers can safely enjoy the outdoors in Boulder’s beautiful, sun-drenched peaks.

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