Long Way Down is a television series and book documenting a motorcycle journey undertaken in 2007 by Ewan McGregor and Charley Boorman, from John o' Groats in Scotland through eighteen countries in Europe and Africa to Cape Town in South Africa. It is a follow-up to the Long Way Round of 2004, when the pair rode east from London to New York via Eurasia and North America.

The journey started on 12 May and finished on 4 August 2007. They were accompanied by the same key team from Long Way Round, including cameraman and director of photography Claudio Von Planta and cameraman Jimmy Simak (who also oversaw music supervision and soundtrack production), and producers Russ Malkin and David Alexanian. They also decided to travel with medic Dai Jones, cameraman and security officer Jim Foster, and various "fixers"—local guides and interpreters. They rode the BMW R1200GS Adventure, the successor to the R1150GS Adventure bikes in Long Way Round.

As with their previous trip, and Boorman's Race to Dakar, Russ Malkin's company Big Earth produced the series. The television series began broadcast on BBC Two on 28 October 2007, with clips also shown online. The series was added to Apple TV+ on 18 September 2020 along with the first iteration Long Way Round (2004) and sequel Long Way Up (2020).