Run 15 miles, 15km or on 15 days in February and help fund the fight against brain tumours. Tailor your challenge to suit you and run wherever you like. Head to your local park and enjoy the fresh air. Take a new route around your community every day. Run on the treadmill at the gym. Go out during your lunch break at work. Join the challenge on your own or team up with your family, friends or colleagues. And why not make your challenge even more fun by adding extra twists? You could run in 15 different places, see if you can find 15 fancy dress outfits or wear 15 different caps – it’s up to you.