The Los Angeles Marathon is an annual marathon held in Los Angeles, California since 1986. It was inspired by the success of the 1984 Summer Olympics held in Los Angeles. The course is 42.195 km - convert26.2mikm long.

Second only to the New York City Marathon, there are more spectators that come out each year than any other marathon (over 1,000,000) and cheer on the 25,000+ runners by name, thanks to personalized bibs, which were introduced in 2003.

The 22nd Los Angeles Marathon, run on March 4, 2007, featured a new course that begins at Universal Studios Hollywood and runs through "globally recognizable landmarks (List of sites of interest in the Los Angeles area)" in the Los Angeles (Los Angeles, California) area. For the first time, the race entered Boyle Heights on the East Side (East Los Angeles (region)) of Los Angeles, before heading back to the finish line downtown. The XXIII marathon took place on March 2, 2008.

On September 25, 2008, Los Angeles Dodgers owner Frank McCourt (Frank McCourt (executive)) completed a deal to acquire operating rights to the Los Angeles Marathon. The basic course that will be used is the 2006 course, and the date for the XXIV Marathon was moved to Monday, May 25, 2009, Memorial Day.

On July 30, 2009 the XXV Los Angeles Marathon committee announced the race would once again take place in March. On November 9, 2009, Marathon officials revealed the new 2010 ?Stadium to Sea? course that takes runners from downtown Los Angeles to the Santa Monica coastline.