Longmont Potion Castle

The LA Record describes Longmont Potion Castle's albums as unlike those that most people associate with prank telephone calls, citing that his demeanor is nothing at all like that of The Jerky Boys and Crank Yankers and is actually closer to that of the alternative comedian Neil Hamburger. In a review from the Denver Westword, LPC's recordings are described as advancing "absurdity as an art form." Actor Rainn Wilson, a fan of LPC, has compared his work to "The Marx Brothers at their greatest. There’s a surreal aspect, as if Salvador Dali were doing prank phone calls.”

Longmont Potion Castle had a brief cameo in the 2018 psychological thriller film Cam as a phone operator.

In 2016, a crowdfunded documentary on Longmont Potion Castle entitled Where in the Hell is the Lavender House? was announced.

In 2006, Longmont Potion Castle announced his retirement. In an interview with The Nerve Magazine, he explained that the box set Longbox Option Package would be the final LPC release. However, in 2008 he released a new CD, Longmont Potion Castle Volume 6. In 2009, he released Volume 7 (not to be confused with his 2005 album of the same name released as a part of the Longbox Option Package box set, a disc that contained only thrash metal music). The album featured several celebrity calls, including ones to singer Eddie Money, Jeopardy! host Alex Trebek, and guitarist Rick Derringer. January 2011 saw the release of LPC 8, in which the artist primarily used Skype on a laptop computer to record the calls.

Longmont Potion Castle (born 1972) is the pseudonym of an anonymous surrealist prank caller active in Colorado and the Los Angeles areas since 1986. Details about his personal life are scarce, and his real name is unknown to the public. Over the years, his mostly self-released albums have gained a cult following, notably among musicians.