**Denver Sun: Altitude SPF Lies Aging Skin?**

By Franklin Everett Shaw

August 12, 2025

Forget the beach vacation sunscreen. We’re talking about survival gear for your face, specifically if you live in Denver.

Denver’s altitude and relentless sun demand a sunscreen strategy that goes beyond the drugstore aisle’s generic promises. It’s not just about avoiding sunburn; it’s about fighting premature aging in a climate that’s actively trying to wrinkle you.

Let’s dive into the specifics of sunscreen in the Mile High City.

The Problem: Denver’s Unique UV Challenge

Denver sits at 5,280 feet above sea level. This altitude means less atmosphere to filter out harmful ultraviolet (UV) radiation. For every 1,000 feet you ascend, UV levels increase by approximately 4-5%. That’s a significant jump compared to sea-level cities.

The sun’s intensity is further amplified by reflection. Snow, a common sight in Denver’s surrounding mountains, reflects up to 80% of UV radiation. Even on cloudy days, UV rays can penetrate, making daily sunscreen use non-negotiable.

The result? Accelerated photoaging. This includes wrinkles, sunspots, and a general loss of skin elasticity. Denverites are essentially aging faster due to sun exposure if they don’t take proper precautions.

SPF: More Than Just a Number

SPF, or Sun Protection Factor, measures a sunscreen’s ability to block UVB rays, the primary cause of sunburn. However, SPF doesn’t tell the whole story. It doesn’t measure protection against UVA rays, which contribute significantly to photoaging.

For Denver, a minimum SPF of 30 is recommended. However, consider SPF 50 or higher, especially if you spend extended periods outdoors. Don’t be fooled into thinking a higher SPF allows you to stay in the sun longer without reapplying. Reapplication is key, regardless of SPF.

Broad Spectrum: Your Shield Against UVA

“Broad spectrum” is the crucial phrase to look for on sunscreen labels. This indicates that the product protects against both UVA and UVB rays.

UVA rays penetrate deeper into the skin than UVB rays, damaging collagen and elastin. This leads to wrinkles and premature aging. Broad-spectrum protection is essential for combating Denver’s intense sun.

Ingredients Matter: Mineral vs. Chemical

Sunscreens generally fall into two categories: mineral and chemical. Mineral sunscreens use zinc oxide and/or titanium dioxide to physically block UV rays. Chemical sunscreens use chemicals that absorb UV radiation.

Mineral sunscreens are generally considered safer and more effective, especially for sensitive skin. They are also more environmentally friendly. However, some mineral sunscreens can leave a white cast on the skin. Look for “tinted” mineral sunscreens to avoid this.

Chemical sunscreens are often thinner and easier to apply. However, some chemicals, like oxybenzone and octinoxate, have been linked to hormone disruption and coral reef damage. Avoid these ingredients if possible.

Application: The Devil is in the Details

Even the best sunscreen is useless if applied incorrectly. Most people don’t use enough sunscreen. You should apply at least one ounce (about a shot glass full) to your entire body.

Don’t forget often-missed areas like your ears, neck, and the tops of your feet. Apply sunscreen 15-30 minutes before sun exposure to allow it to bind to your skin.

Reapplication is critical, especially in Denver’s intense sun. Reapply every two hours, or more frequently if you’re sweating or swimming.

The Ski Slope Survival Guide

Skiing and snowboarding in Colorado offer unparalleled sun exposure. The combination of high altitude, reflective snow, and prolonged outdoor activity demands extra vigilance.

Here’s a step-by-step guide to sunscreen application on the slopes:

1. Start Indoors: Apply a generous layer of broad-spectrum, water-resistant sunscreen to your face, neck, and ears before you even leave your house.
2. Lip Protection: Use a lip balm with SPF 30 or higher. Lips are particularly vulnerable to sun damage.
3. Reapply on the Lift: Keep a travel-sized sunscreen in your pocket and reapply every two hours, or more frequently if you’re sweating.
4. Don’t Forget Your Goggles: Goggles protect your eyes from UV radiation. Make sure they fit properly to prevent gaps that expose your skin.
5. Consider a Buff: A neck gaiter or buff can provide additional sun protection for your neck and face.

Common Mistakes and How to Avoid Them

• Skipping Sunscreen on Cloudy Days: UV rays penetrate clouds. Don’t assume you’re safe just because the sun isn’t shining.
• Relying on Makeup with SPF: Makeup with SPF is not a substitute for sunscreen. You need a dedicated sunscreen product to achieve adequate protection.
• Using Expired Sunscreen: Sunscreen degrades over time. Check the expiration date and discard any expired products.
• Not Protecting Your Scalp: If you have thinning hair or a bald spot, apply sunscreen to your scalp.
• Forgetting Your Hands: Your hands are constantly exposed to the sun. Apply sunscreen to your hands regularly, especially after washing them.

Denver-Specific Recommendations

While any broad-spectrum sunscreen is better than none, some products are particularly well-suited for Denver’s climate. Look for sunscreens that are:

• Water-resistant: This is especially important if you’re active outdoors.
• Non-comedogenic: This means they won’t clog your pores, which is important in Denver’s dry climate.
• Fragrance-free: Fragrances can irritate sensitive skin, which is more common at high altitude.

Consider brands like EltaMD, La Roche-Posay, and Supergoop!, which offer a range of high-quality sunscreens that are popular among dermatologists.

Beyond Sunscreen: Additional Protection

Sunscreen is your first line of defense, but it’s not the only tool in your arsenal. Consider these additional strategies:

• Seek Shade: Limit your sun exposure during peak hours (10 am to 4 pm).
• Wear Protective Clothing: Long sleeves, pants, and wide-brimmed hats can provide significant sun protection.
• Sunglasses: Protect your eyes from UV radiation with sunglasses that block 100% of UVA and UVB rays.

The Long-Term Payoff

Protecting your skin from the sun is an investment in your future. By adopting a consistent sunscreen routine, you can significantly reduce your risk of skin cancer and premature aging.

Don’t let Denver’s beautiful sunshine turn into a beauty liability. Embrace the sun, but do it responsibly. Your skin will thank you for it.