Trail running

Carlos told me about this beautiful hike we could try. He is currently training for Speed Trail Peñamayor, and I'm completely out of shape, so to convince me, he went like: "it's only 10km, don't worry".

He didn't mention how steep it was. While I haven't trained in months, I can handle that distance at a slow pace without much struggle; but I wasn't aware of how hard such a distance becomes when the elevation gain is around 700m.