A race through the Pentland Hills will be hosted by Cancer Research UK
Scots are being urged to get tough on cancer by signing up for an adrenaline packed event.
Edinburgh was one of a handful of cities chosen to host Tough 10 for the first time last year, and the challenging 10k trail returns to the city this year.
Cancer Research UK is daring men and women across the city to brave the elements and sign up now for the fundraising challenge event, which takes place in the Pentland Hills on 5 November.
The Tough 10 series offers three different levels of difficulty to choose from at events across the UK – tough, tougher or toughest.
The Edinburgh route is ranked toughest so it's a feat not for the faint-hearted.
As runners push through the punishing hills, they will be running in aid of a good cause – raising money for life-saving research.
Lauren Robertson, Cancer Research UK event manager, said: "We saw Edinburgh tackle Tough 10 in 2016 so we know people in the city have got what it takes to take on a challenge for such an important cause.
"Every day, around 87 people in Scotland are diagnosed with cancer. That's why we need as many people as possible to double knot their trainers and raise money by taking on our stamina-testing course.
"The rewards for the thigh-burning inclines are stunning scenery of Pentland Hills and the knowledge that every step brings us closer to beating cancer sooner."
Organisers hope hundreds of people will enter Tough 10 in Edinburgh and raise vital funds to help Cancer Research UK's scientists find new ways to prevent and diagnose the disease and to develop new, better and kinder treatments.