If you want to run without risking wrinkles and skin cancer, follow these suggestions from The Skin Cancer Foundation's Communications Director, Erin Mulvey, a veteran triathlete.

• Run during hours when the sun is less intense. Generally it is strongest between 10 a.m. and 4 p.m. If you train during those hours, find shady places to run.
• Put sunscreen on before your running outfit, not at the race site. This will give it time to soak in and keep you from applying it less thoroughly or forgetting it altogether because of pre-race excitement. Use an SPF 15 or higher sunscreen. "I use a 30 or 45 sport or water-resistant formulation," adds Erin. "You may want to use a stick formulation on your face so that it doesn't run."
• Run in a hat and UV-blocking sunglasses. Polarized lenses help beat the glare.
• Always keep sunscreen in your race bag.
• Have a friend posted somewhere in the second half of the race to hand you a small, one-use, wipe sunscreen (or keep a small packet in your pocket), so that you can reapply it to your face, neck and arms as you run. You can do that without really breaking stride. Sunscreen starts to lose effectiveness at about the two-hour mark, or even sooner if you are sweating heavily.
• Before post-race festivities begin, reapply sunscreen, and give yourself a quick massage in the process to help relax your sore muscles.
• Post-race clothes should include a lightweight but longsleeved T-shirt and sweats. Darker colors offer ideal sun protection. Or opt for special sun-protective clothing - lots of companies are making it now.