They come out to run at night, under a full moon, just like wolves. But the similarities don’t end there: their “war cry” has something of a howl about it and they hunt in packs. In case you hadn’t realised, we’re talking about the moon runners who meet once a month in the outskirts of Barcelona to run freely, guided by the silvery light of the full moon.

“The Full Moon Run isn’t a night race,” explain the organisers. “There are no race chips or entry fees… The event takes place every month on the night of the full moon. Whatever the day. Whatever the weather.” It’s all about having fun, enjoying every step and leaving the day’s stresses behind.

It all began in January 2015, when Carlitos González was training for his fifth marathon. One night, alone during a long training session, he realised his strides were accompanied by an enormous full moon. González decided to break from his routine and switch off his head torch so he could run solely in the light of this unexpected partner. An idea began to take shape in his head: why not share this experience with others? And that’s exactly what he has been doing with the other moon runners for the last for 25 moons.

The pack is open to everyone. You just need to check the website and wait for the time and place of the meet-up to be revealed on the day of the full moon. Then it’s time for the run: a simple, flat route of up to eight kilometres, No GPS, no torches, accompanied only by the moon and a group of “grinning lunatics” with a passion for nature and all things nocturnal.