Yorkshire-based Heart Research UK is calling on walkers to take part in its annual Three Peaks challenge in June.

The charity is hosting its 17th Yorkshire Three Peaks Challenge on June 15, across Pen-y-ghent, Whernside and Ingleborough, and is appealing for more people to join in with its biggest fundraiser of the year.

There is no entry fee and no minimum sponsorship, so all walkers have to do is raise as much money as possible for Heart Research UK.

You can sign up as an individual or as a group.

The challenge is not a race but the official aim is to complete all three peaks in less than 12 hours.

Visit heartresearch.

org.uk/hike-your-heart-yorkshire-three-peaks-challenge-2013 or call 0113 2347474 to request an information pack.