Obstacle course racing (OCR) is a sport in which a competitor, traveling on foot, must overcome various physical challenges that are in the form of obstacles.
 Mud and trail runs are combined and the races are designed to result in mental and physical collapse.
 Obstacles include, but are not limited to, climbing over walls, carrying heavy objects, traversing bodies of water, crawling under barbed wire, and jumping through fire.
 Many obstacles are similar to those used in military training, while others are unique to obstacle racing and are employed throughout the course to test endurance, strength, speed and, dexterity.
 Races vary in both distance and challenge level, combining trail running, road running, and cross country running.
 With race venues typically in large cities, organizers encourage athletes of all types to participate.
 All Obstacles were introduced into Cross Country Running at Tough Guy, recorded on video 1989 - 2007.
 Most signature obstacles were actually created by Mr Mouse.
 According to the "Los Angeles Times" in 2012, the number of events—typically all-day festivals—rose rapidly.
 In accordance with the sub-culture's fast rate of growth, the "Obstacle Race Magazine" was launched.
IAAF Road Race Label Events are races that the International Association of Athletics Federations (IAAF) designates as one of the "leading road races around the world."
 The classification was first introduced for the 2008 running season, upon the suggestion of the IAAF Road Running Commission.
 In that first year, only Gold and Silver Labels were awarded, and 49 races were recognised.
 A third tier was introduced in 2010, entitled the Bronze Label, and in 2015, 88 races were listed in total.
 The races are split into three categories: marathons, half marathons and other.
 Within the "other" category are traditional road race distances, over which IAAF world records can be set, along with some "Classical races," which span unusual distances.
The 5K run is a long-distance road running competition over a distance of five kilometres (3.1 miles).
 Also referred to as the 5K road race, 5 km, or simply 5K, it is the shortest of the most common road running distances.
 It is usually distinguished from the 5000 metres track running event by stating the distance in kilometres, rather than metres.
Road running is the sport of running on a measured course over an established road (as opposed to track and field and cross country running).
The 10K run is a long-distance road running competition over a distance of 10 km .
 Also referred to as the 10K road race, 10 km, or simply 10K, it is one of the most common types of road running event, alongside the shorter 5K and longer half marathon and marathon.
 It is usually distinguished from the 10,000 metres track running event by stating the distance in kilometres, rather than metres.
The Cobe Trophy Race was an automobile race held in Indiana, in 1909 and 1910.
 The trophy was named for, and donated by, Ira M. Cobe, president of the Chicago Automobile Club.
 As one of the first long-distance races in the area, it was billed as the "Vanderbilt of the west," a reference to the Vanderbilt Cup Race, which had been held in Long Island, New York since 1904.
 The first running took place at the Crown Point Road Race Circuit, in northwestern Indiana.
 For the second year, proposals were submitted by the Indianapolis Motor Speedway and by the Elgin Road Race Course, just west of Chicago.
 Ultimately, the Board of Managers of the Chicago Automobile Club decided to make the 1910 race a speedway event, rather than a road course contest, and hence the second race was run at Indianapolis.
 At the time of this decision, the Club also announced the intent to bring the race to the Chicago area in 1911.
 As it turns out, though, there was no Cobe Trophy race in 1911 or in later years.
 Only two drivers competed in both Cobe races, 1909 winner Louis Chevrolet and his teammate, Bob Burman.
The Ice Breaker Road Race, held annually in Great Falls, Montana in April of each year, is a road race that draws over 3,000 walkers, joggers and marathoners.
 The race was established in 1980 and has been run annually ever since.
 The course starts in Downtown Great Falls at the Civic Center, going East through the business district, winds through several residential neighborhoods, across the scenic Central Avenue West Bridge and eventually ends up back downtown.
The Around the Bay Road Race is the oldest long distance road race in North America, held in Hamilton, Ontario since 1894.
 It is not marathon length, nor has it continuously run (thus the Boston Marathon, founded in April 1897, is the longest running marathon, and the nearby Buffalo Turkey Trot, established November 1896, is the longest continually running footrace).
 The 30 kilometre race is also known as the "Billy Sherring Memorial Road Race."
 It is also called the "30K Around The Bay."
The Giro di Castelbuono (officially Giro Podistico Internazionale Castelbuono) is an annual road running competition over 10 kilometres which takes place in Castelbuono, on the island of Sicily, Italy.
 First held in 1912, the competition, which holds IAAF Gold Label Road Race status, is one of the oldest road races in Europe, which is the inspiration for the event's nickname – "La Corsa Più Antica" ("The Oldest Race").
 The race, typically held on (or around) July 26 to coincide with Saint Anne's Day, has been held almost every year since its inauguration, although the two World Wars interrupted the event over those periods.
 The race has been broadcast every year for a decade by Italian television channel Rai Sport Più.
The Double Road Race is a long-distance road running competition consisting of two segments or "legs" – a 10-kilometer road run, followed by a five-kilometer road run, with a short rest break in between.
 The Double Road Race Federation added additional distances in August 2014.
 Other official distances for Double Racing® include Double 5k (3+2), Double 8k (5+3), and Double 21k (15+6).
 The race was created by Runner's World magazine founder Bob Anderson.

Question: Which one is the sport running on a measured course Ice Breaker Road Race or Road running? 
Answer: Road running