STN MTN / Kauai is the combined release of the seventh mixtape and second extended play (EP) by American recording artist Donald Glover, under his stage name Childish Gambino. The STN MTN mixtape was released on October 2, 2014 as a free download from DatPiff, while the Kauai EP was made available the following day through online music stores by Glassnote Records. They are each considered dual sides of a concept album that are unified by a cohesive story line, and come ten months after Glover's second studio album, Because the Internet.

Producers who contributed to the mixtape include Donald Glover himself, as well as Nick Banga, Big Soj, Ludwig Göransson, Chris Hartz, Tim Suby, and Zaytoven.

On October 5, 2014, fans on Reddit discovered a hidden a cappella verse on one of Donald Glover's websites. It was confirmed by Gambino that the verse syncs up with the instrumental portion of "V. 3005 (Beach Picnic Version)".

While STN MTN is free, the proceeds from the sales of Kauai are dedicated to maintaining and preserving Kauai island, which the second half of the EP is named after. The letters STN MTN are an abbreviation/disemvoweling of Glover's hometown, Stone Mountain, Georgia.

STN MTN is a concept mixtape where Glover is asleep dreaming he "ran Atlanta", with songs based off modern day southern hip hop. The mixtape ends with Glover awaking from this dream on the Hawaiian island, Kauai. Kauai is a concept EP. Unlike STN MTN, Kauai focuses on themes such as love, nostalgia and passion, using alternative R&B. A song from the EP Kauai, "Retro [Rough]", is based on Gambino's earlier song, "Love Is Crazy" featuring Eugene Cordero, from his mixtape Sick Boi.

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