SunUp
The free app that keeps summer runners sun-smart — personalized burn time, UV forecasts, and air quality in one place.
At the 2026 Event
Official Sun Safety App — kept runners informed on UV exposure through summer training and on race morning.
SunUp was the Official Sun Safety App of the 2026 Mercedes-Benz Oakville Bronte Harbour Classic 5K.
SunUp delivers real-time UV index, air quality, and personalized burn time based on your skin type, age, and activity — so runners can train and race safely outdoors, especially through summer race season. With a 48-hour forecast, family mode, and hundreds of contextual tips, it turns “is it safe to be out right now?” into a question runners can actually answer. On a sunny Father’s Day morning by the water, that’s exactly the kind of partner a race wants in its corner.
“Summer training shouldn't cost you a sunburn. SunUp tells you exactly how long you can safely stay out.”
What they bring
Real-time UV index
Your exact-location UV index, refreshed every 15 minutes with a 48-hour hourly forecast.
Learn more →Personalized burn time
Safe-exposure time calculated for your skin type, age, and planned activity — not a generic number.
Learn more →Air quality built in
AQI tracking alongside UV, so you see the full picture before you head out.
Learn more →Family mode
Check sun safety for any family member by their name, age, and skin type — protection for the whole crew.
Learn more →On race day
See all 3 photos →
For our runners
Download SunUp free
Train and race safely all summer with personalized burn time, a 48-hour UV forecast, and air-quality data — free on iOS.