The Trail Ruta de la Piedra is a 10 km mountain race with 200 meters of positive elevation gain, held in Valdemorillo, Madrid. This event is part of the ZIMA ZERO Trail Series and runs along paths, trails, and livestock tracks, passing through natural landscapes and historical sites such as those related to the Battle of Brunete. The race is designed to offer an accessible yet challenging course, ideal for those new to trail running or seeking a fast and technical race. The participant limit is 250 runners per category, contributing to a more intimate and controlled atmosphere. The organization provides chip timing and mandatory checkpoints to ensure the safety and fair competition of all athletes.