The traditional distance of a marathon is 26.2 miles (42.2 kilometers), which originated from the ancient Greek legend of Pheidippides running from Marathon to Athens to deliver news of the Greek victory over the Persians.

The Boston Marathon, held annually in Boston, Massachusetts, USA, is the world's oldest annual marathon, dating back to 1897.

In the world of ultramarathons, distances beyond the traditional marathon length of 26.2 miles (42.2 kilometers) are considered ultramarathons. This includes distances like 50 kilometers, 100 miles, 200 kilometers, and even longer.

The Ultra-Trail du Mont-Blanc (UTMB) is widely considered the most prestigious ultramarathon in the world. This grueling race takes place in the stunning surroundings of the Mont Blanc massif in the Alps, covering a distance of approximately 170 kilometers with over 10,000 meters of elevation gain.

Shin splints, plantar fasciitis, and stress fractures are all common injuries among long-distance runners due to the repetitive impact and stress on the body. Proper training, footwear, and recovery are essential to prevent these injuries.

Bonking is the term used to describe the sudden loss of energy and fatigue that can occur during a long-distance run, often due to glycogen depletion and dehydration. It is essential to maintain proper nutrition and hydration during endurance events to avoid bonking.

Ultramarathoners often employ various sleep strategies to manage sleep deprivation during long races. Power naps, biphasic sleep (two main sleep periods), and polyphasic sleep (multiple short sleep periods) are all common approaches used to optimize rest and recovery while minimizing the impact on race performance.

Runner's high, flow state, and endorphin rush are all terms used to describe the psychological state of euphoria, heightened awareness, and reduced perception of pain that some runners experience during long-distance runs. These positive feelings are often attributed to the release of endorphins and other neurochemicals in the brain.

When choosing an ultramarathon race, it is important to consider various factors such as elevation gain, terrain type (e.g., mountains, trails, roads), weather conditions, and the overall difficulty and distance of the race. These factors can significantly impact the physical and mental challenges of the event.

Non-stop running, continuous running, and ultra-running are all terms used to describe the practice of running long distances without stopping for breaks. This approach is often used in ultramarathons and other endurance running events.

Trail ultramarathon, mountain ultramarathon, and skyrunning are all types of ultramarathons that involve running through mountainous terrain. These races often feature challenging climbs, descents, and technical sections, requiring a combination of endurance, strength, and agility.

Ultra-brain, runner's psychosis, and endurance hallucination are all terms used to describe the phenomenon of experiencing hallucinations or altered perceptions during an ultramarathon. These experiences can be caused by a combination of factors, including sleep deprivation, physical exhaustion, and the release of certain neurochemicals in the brain.

Training for an ultramarathon requires a comprehensive approach that includes building endurance, strength training, and mental preparation. Endurance training involves gradually increasing the distance and duration of runs, while strength training helps to improve muscle strength and prevent injuries. Mental preparation is also crucial to develop the resilience and determination needed to overcome the challenges of an ultramarathon.

Ultramarathon stacking, ultra-challenge, and endurance challenge are all terms used to describe the practice of running multiple ultramarathons in a short period of time, often within a few days or weeks. This extreme form of endurance running requires exceptional physical and mental preparation, and is undertaken by a select group of ultramarathoners.

Desert ultramarathon, Sahara ultramarathon, and Gobi ultramarathon are all types of ultramarathons that involve running through desert terrain. These races often take place in extreme heat and challenging conditions, requiring participants to be well-prepared for the unique demands of desert running.