Most runners obsess over hydration, fuelling, shoes and recovery. But there’s one thing many of us still don’t think enough about: sun protection.
We’re out there for hours, whether it’s a weekend long run, an all-day ultra or simply squeezing in a lunchtime 10k. Every mile in the sunshine feels like a bonus… but over the years those miles add up.
Skin cancer rates continue to rise, yet sun protection has never been easier. Sunscreens are inexpensive and widely available, UV forecasts are included in most weather apps, and lightweight sun-protective clothing is now designed specifically for runners.
The good news? A few small habits can dramatically reduce your risk without spoiling your run.
The simplest rule you’ll ever remember
Forget complicated advice.
If the UV Index is 3 or above, protect your skin.
Most weather apps show the UV Index alongside the temperature, so it’s easy to check before heading out.
- UV 0-2: Lower risk, although fair-skinned runners may still want protection.
- UV 3+: Time to think about clothing, shade and sunscreen.
And remember – clouds don’t block UV rays. It’s entirely possible to get sunburnt on a cool, overcast day in the mountains.
Your three-step sun protection strategy
1. Run at the right time
If your schedule allows, this is the easiest win.
An early morning long run doesn’t just mean quieter trails and cooler temperatures—it also avoids the strongest UV radiation of the day.
Save strength sessions, gym work or the treadmill for those blazing lunchtime hours if you can.
2. Let your clothing do the work
Unlike sunscreen, clothing doesn’t sweat off after an hour.
A lightweight running cap protects your face, ears and scalp. Sunglasses shield your eyes from UV, while modern UPF-rated tops provide excellent protection without feeling heavy or restrictive.
Think of clothing as your first line of defence.
3. Sunscreen still matters
Even with good clothing, exposed skin still needs protecting.
Choose a broad-spectrum SPF 50+ and apply it before you head out.
The places runners most often forget?
- Ears
- Back of the neck
- Shoulders
- Backs of the hands
- Hairline and thinning areas of the scalp
If you’re out for several hours, remember that sunscreen isn’t permanent, especially when you’re sweating.
Don’t forget the heat
There’s a balance to strike.
Covering every inch of skin might protect you from UV, but in hot conditions it can also make it harder for your body to cool itself.
Choose lightweight, breathable clothing designed for running, and adjust your kit according to both the temperature and the UV forecast.
When should you get a mole checked?
Trail runners pick up all sorts of scratches, bites and mysterious marks. Most disappear after a few days.
But if something doesn’t…
Don’t assume it’s just friction from your pack, a stubborn insect bite or a bit of trail rash.
Arrange a GP appointment if you notice:
- A mole changing in size, shape or colour.
- A spot that starts itching, bleeding or crusting.
- A sore that won’t heal.
- A new lump that’s growing over several weeks.
- A rough, scaly patch on skin that’s regularly exposed to the sun.
One useful way to remember what to look for is the ABCDE rule:
- Asymmetry
- Border irregularity
- Colour variation
- Diameter
- Evolution (change over time)
That last one – change – is often the biggest warning sign.
Before every sunny run…
A quick 30-second checklist:
☀️ Check the UV Index.
🧢 Wear a cap and sunglasses.
🧴 Apply SPF 50+ to exposed skin.
🏃 Choose lighter, cooler kit if it’s hot.
🔍 Keep an eye on any moles or skin changes and get anything suspicious checked.
Running is one of the best things you can do for your health. Protecting your skin simply helps ensure you’ll still be enjoying those miles for decades to come.
A little planning before your run is far easier than dealing with the consequences years later.
