
A multisport competition is a family of athletic competitions in which athletes race in a continuous series of stages or "legs", and rapidly switch from one athletic discipline to another in order to achieve the best overall time. Most multisport events are endurance races, consisting of aerobic activities such as cycling, running, kayaking and cross-country skiing.
Adventure racing is typically a multidisciplinary team sport involving navigation over an unmarked wilderness course with races extending anywhere from two hours up to two weeks in length. (What Is Adventure Racing Video) Some races offer solo competition as well. The principal disciplines in adventure racing include trekking, mountain biking, and paddling although races can incorporate a multitude of other disciplines including climbing, abseiling, horse riding, skiing and white water rafting. Teams generally vary in gender mix and in size from two to five competitors, however, the premier format is considered to be mixed gender teams of four racers. There is typically no suspension of the clock during races, irrespective of length; elapsed competition time runs concurrently with real time, and competitors must choose if or when to rest.

The Ancient Olympic pentathlon was an athletic contest at the Ancient Olympic Games, and other Panhellenic Games of Ancient Greece. The name derives from Greek, combining the words pente (five) and athlon (competition). Five events were contested over one day, starting with the stadion, followed by the javelin throw, discus throw, and long jump, and ending with wrestling. While Pentathletes were considered to be inferior to the specialized athletes in a certain event, they were superior in overall development and were some of the most well balanced of all the athletes. Their training was often part of military service—each of the five events was thought to be useful in battle.

An aquathlon is a multisport race consisting of continuous run and swim elements. Competitors complete a swim immediately followed by a run over various distances. Athletes compete for fastest overall course completion, including the time transitioning between the disciplines.

The biathlon is a winter sport that combines cross-country skiing and rifle shooting. It is treated as a race, with contestants skiing through a cross-country trail whose distance is divided into shooting rounds. The shooting rounds are not timed per se, but depending on the competition missed shots result in extra distance or time being added to the contestant's total.

Biathlon orienteering or orienteering shooting is a multisport consisting of shooting and orienteering. The sport is organized internationally by the International Biathlon Orienteering Federation (IBOF), and is mainly practiced in the Nordic countries as well as a few other European countries. Competitions are organised in Denmark by Danish Military Sports Association (DMSA), in Sweden by the civilian Swedish Multisport Association and in Finland by the Finnish Reservist Sports Federation (FRSF).

Chess boxing, or chessboxing is a hybrid sport that combines two traditional pastimes: chess and boxing. Contestants compete in alternating rounds of chess and boxing.

The Coast to Coast is a non-standard multisport competition held annually in New Zealand. It is run from the west coast to the east coast of the South Island, and features running, cycling and kayaking elements over a total of 243 kilometres (151 mi). It starts in Kumara Beach and traditionally finished in the Christchurch suburb of Sumner, but since 2015 finishes in New Brighton. The event was created in 1983 by Christchurch personality Robin Judkins, who sold the rights to Queenstown-based tourism company Trojan Holdings in 2013. Richard Ussher took over from Judkins as race director in 2015.

Cross triathlon, or off-road triathlon, is a form of triathlon, or three-stage race, consisting of a swim stage, mountain-biking stage, and a trail-running stage.

Duathlon is an athletic event that consists of a running leg, followed by a cycling leg and then another running leg in a format similar to triathlons. The International Triathlon Union governs the sport internationally.

Military patrol was a team winter sport in which athletes competed in cross-country skiing, ski mountaineering and rifle shooting. It was usually contested between countries or military units.

The Military Pentathlon is a multisport. It resembles the modern pentathlon but updated to skills used by the modern military.

The modern pentathlon is an Olympic sport that comprises five different events; fencing, freestyle swimming (200 m), equestrian show jumping, and a final combined event of pistol shooting and cross country running (3200 m). This last event is now referred to as the laser-run, since it alternates four legs of laser pistol shooting followed by an 800 m run. The event is inspired by the traditional pentathlon held during the ancient Olympics; as the original events were patterned on the skills needed by an ideal Greek soldier of the era, the modern pentathlon is similarly patterned on events representing the skills needed by cavalry behind enemy lines.

The Naval pentathlon is a multisport which is practiced only by military athletes at the World Military Championships and Military World Games, both events organized by the international federation that governs military sport, the Conseil International du Sport Militaire.

A Swimrun is a multiple-stage competition which involves participants running and swimming over a race course or loop-course that involves at least two transitions between the swim and run stages of the race. All equipment used by participants has to be carried all the way to the finish line.

The Original Mountain Marathon (OMM), formerly known as the Karrimor International Mountain Marathon, and initially simply The Karrimor, is a two-day Mountain event, held in a different region across the UK every year. It was first held in 1968 and continues today. Gerry Charnley, a skilled mountaineer and orienteer, designed the KIMM to test orienteering skills in extreme circumstances; the full-length KIMM course is a double-marathon length race. Each team must carry all their gear, including equipment for an overnight camp. Moreover, the course is not disclosed until the race begins, so each team must have good navigation skills. Some have called the KIMM the forerunner of modern adventure racing.

Racketlon is a combination sport in which competitors play a sequence of the four most popular racket sports: table tennis, badminton, squash, and tennis. It originated in Finland and Sweden and was modeled on other combination sports like the triathlon and decathlon.

Ski orienteering (SkiO) is a cross-country skiing endurance winter racing sport and one of the four orienteering disciplines recognized by the IOF. A successful ski orienteer combines high physical endurance, strength and excellent technical skiing skills with the ability to navigate and make the best route choices while skiing at a high speed.

The Solent Amphibious Challenge is a day-long multi-discipline adventure race over land and sea, held every year in the Solent. The aim of the race is to test the competitor's leadership and navigation and seamanship in a physically demanding combined challenge. The Solent Amphibious Challenge is believed to be the first sea-land style adventure race of its kind, and the race is only open to teams from the British Armed Forces. The teams consist of five personnel; a yachtmaster qualified team leader who must know well the International Regulations for Preventing Collisions at Sea and Local Notices to Mariners, two crew members, a runner and a support cyclist.

Superstars is a sports competition in which elite athletes from a variety of sports compete against each other. The athletes must not compete in the sport for which they practice their profession; resembling a decathlon. Points are awarded for the position in which the competitor places in each event. The competitor with the most points at the end of all ten events is declared the champion.

A Swimrun is a multiple-stage competition which involves participants running and swimming over a race course or loop-course that involves at least two transitions between the swim and run stages of the race. All equipment used by participants has to be carried all the way to the finish line.

Triathle is a sub-sport of modern pentathlon consisting of running, swimming and shooting.

A triathlon is an endurance multisport race consisting of swimming, cycling, and running over various distances. Triathletes compete for fastest overall completion time, racing each segment sequentially with the time transitioning between the disciplines included. The word is of Greek origin, from τρεῖς or treis (three) and ἆθλος or athlos (competition).

Ultraman is a three-day, 515 km multisport race modelled on the one held annually on the Big Island of Hawaii which is now called the Ultraman World Championship. "Ultraman" is a branding for events affiliated with the Hawaii original. Each race is divided into three stages over three days: The first is a 6.2-mile (10-km) ocean swim from Kailua Bay to Keauhou Bay, followed by a 90-mile (145-km) cross-country bike ride, with vertical climbs that total 6,000 feet. Stage two is a 171.4-mile (276-km) bike ride from Volcanoes National Park to Kohala Village Inn in Hawi, with total vertical climbs of 4,000 feet. Stage three is a 52.4-mile (84-km) double-marathon, which starts at Hawi and finishes on the beach at the Old Kona Airport State Recreation Area. Each stage must be completed within 12 hours or less. The swim portion of stage one must be completed in 5.5 hours or less. Competitors who do not reach the finish lines within the time limits are disqualified, but encouraged to continue racing each day as participants.