Competitors face 10 obstacle zones during the race
Edinburgh is to be turned into a giant assault course for a race expected to attract 1,500 runners.
Men's Health Survival of the Fittest will see competitors tackle a different obstacle every kilometre of the 10km route.
Participants will face challenges such as a giant hay bale wall, an Army-style assault course, jumps and a high wire.
The event, which was held for the first time last year in Nottingham, is due to take place on 18 October.
The organisers are the team behind the Rat Race Urban Adventure Race Series, established in Edinburgh in 2004.
They said competitors could expect a "tough, challenging route", with the "unique features" of the city woven into the route's infrastructure.
From a base in Princes Street Gardens, the race promises to utilise much of Edinburgh's collection of steep mediaeval streets and wynds including the Royal Mile and Cowgate, as well as passing over Calton Hill.
Claire Matthews, marketing director of magazine Men's Health, said: "We want to promote the benefits of exercise and keeping a healthy body and mind and prove that you can have a ton of fun along the way."