My Field Trip to Planet 9 is the debut studio album by Justin Warfield.

Jason Ankeny of AllMusic wrote, "The hip-hop debut of Justin Warfield is built around old-school rhythms fleshed out with some intriguing samples, drawn largely from the canon of '60s psychedelic rock.

"[1] Geoffrey Himes of The Washington Post was more critical, saying, "[Warfield's] raps, with their tired mix of criminal boasting, gratuitous weirdness and hip-hop cliches, leave almost no impression at all.

"[8] In 2014, The Village Voice's Jonathan Patrick listed My Field Trip to Planet 9 as one of "The 10 Best Forgotten New York Hip-Hop Records", writing, "Perhaps best labeled as psychedelic rap (mostly on account of its subject matter), My Field Trip to Planet 9 plays out like a hippie's take on golden-era hip-hop".

[9] The following year, Fact ranked it as the 43rd-best trip hop album of all time.