The Marathon Bar was a long, 8-inch (or even 15-inch in some regions) braided caramel and milk chocolate candy bar by Mars, known for its tagline "the candy bar you can't eat quickly" due to its tough, chewy caramel, discontinued in the US in 1981, leaving behind fond memories and a search for similar treats like the UK's Curly Wurly. Its red wrapper even had ruler marks to prove its length, but slow sales eventually led to its discontinuation, despite its unique, long-lasting appeal.

Key Characteristics:

Appearance: A long, braided rope of chewy caramel coated in milk chocolate.

Length: Around 8 inches, with some rare 15-inch versions.

Packaging: Bright red wrapper with ruler markings on the back.

Tagline: "The candy bar you can't eat quickly".

Texture: Very chewy caramel that made it last a long time.

Discontinuation: Introduced in 1973 and discontinued in the U.S. in 1981. Reasons cited include slow sales and the unique, challenging texture that wasn't universally loved.