Marathon may refer to:
- The video game series.
- The trope known as Marathon Level, which is a really long level.
- The piece of trivia known as Marathon Running, where a network will run multiple episodes of the same show back-to-back for an extended period of time.
- Marathon Media, a French television studio based in Paris.
- Marathon 1980, an American TV movie
- Marathon 2002, an American film
- Marathon (2005), a South Korean film
- Marathon 2010, an American movie
- Marathon, a sci-fi novel trilogy by David Alexander Smith about First Contact.
- Men, Martians and Machines, a sci-fi novel by Eric Frank Russell about the adventures of spaceship Marathon.
- A 26.2 mile-long foot race, run in honor of Pheidippides carrying news of the Greek victory at Marathon to Athens.
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