"Mountain Song" is a song by Jane's Addiction and the second single from their 1988 album Nothing's Shocking. "Mountain Song" was the first song written by the band in 1985, before a band name had even been decided upon. The song was initially recorded in 1986 and featured on the soundtrack to the film Dudes, starring Jon Cryer. This version can also be found as a track on the 1997 alternate & live cut compilation album Kettle Whistle. "Mountain Song" was re-recorded in 1988 for Nothing's Shocking.

The single, first released in December 1988, features only the Nothing's Shocking version and not the 1986 original. The b-side "Standing in the Shower... Thinking" is also taken from Nothing's Shocking. The single was re-released on April 18, 2009, to help promote the Jane's Addiction box set A Cabinet of Curiosities, released the same month. The packaging was generally the same but contained several inserts promoting the box set and the band's albums.

"Mountain Song" was named the 71st best hard rock song of all time by VH1.

There are two different music videos for this song. The second video, directed by Perry Farrell with live footage directed by Modi Frank, exists in three different versions: the original, the original censored for MTV, and Modi Frank's director's cut. Footage for this video was shot at the Scream in Hollywood on August 19, 1988. Banned from MTV because of nudity, a censored version which puts black bars and shapes over Perry Farrell and Casey Niccoli's private parts was created and MTV agreed to air it on Headbangers Ball and 120 Minutes. As a means to make the official, unedited version available to fans, Jane's Addiction released the "videomentary" Soul Kiss on Valentine's Day 1989. In addition to the "Mountain Song" video, the VHS also features footage of the band performing comedic sketches and footage of the band performing a song called "City" which wouldn't appear on an album until the Kettle Whistle compilation in 1997.

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