Some 600 people have registered interest to take part in the Barnsley Hospital Zombie Run later this year - including groups from Norway and Holland.
The five kilometre off-road race, organised in aid of the Barnsley Hospital Charity, takes place at Worsbrough Mill and Country Park on October 19.
Runners this year face two problems on the route - 12 obstacles and hundreds of bloodthirsty zombies who will be hot on their heels.
Katie Cartwright, fund-raising manager for Barnsley Hospital Charity, is pleased with the uptake, particularly with people coming from overseas.
She said: "So far we've got about 600 who have registered interest and it's not taking place until October so I think we're going to sell out to the capacity of about 1,000 places.
"We're going to have to send runners out in waves of about 200 people at a time at 20 minute intervals.
"I'm really pleased with how it is going and I think it's a mix of things that's attracted people, with new zombie films and TV shows like The Walking Dead playing a part.
"It's something different to do and we've even got groups of people coming from Norway and Holland who have heard about it on social media sites."
Katie said Wheels and Dreams will be supplying speciality vehicles for the day so the park looks the part, such as US Sheriff cars and a New York ambulance.
There is also an army of make-up artists who will be on hand with lots of latex and fake blood create the look of the living dead on willing zombie volunteers - which are still needed.
Anyone wanting to volunteer should visit www.facebook.com/ZombieRunUK.