The phrase denotes a specific type of footrace covering a distance of approximately 50 kilometers (roughly 31 miles). These events typically involve significant elevation gain, starting at a lower altitude and culminating at a higher point, often a mountain summit. An example would be an organized race beginning near sea level and finishing at the peak of a prominent mountain.
Such races present a considerable physical and mental challenge to participants. The importance of completing the event lies in demonstrating endurance, resilience, and strategic planning. Historically, these types of races have grown in popularity, reflecting a broader interest in extreme sports and a desire for pushing personal limits in natural environments. The benefits of training for and participating in such an event include improved cardiovascular health, increased mental fortitude, and a deeper appreciation for the natural landscape.
