The longtime rumors have become official: Improvisational rock masters Phish will return to Las Vegas for another Halloween weekend, this time stretching its late-October run to a four-night stand.

The Vermont-based quartet will play October 28-31 at the MGM Grand Garden Arena, the site of its last Halloween weekend extravaganza. Tickets are $65 and can currently be requested through an online form found here. Fans can request for more than one show, but every solicitation must happen at the same time and no later than August 14 at 8:59 p.m. Vegas time. Status updates from the ticketing service will be sent within the next three days. (Information regarding the general on-sale wasn't available at press time, though Phish's website says tickets will be available to the public beginning August 18.)

Phish's Halloween runs are legendary within its fanbase, the jam band scene and those in-the-know rock fans. Besides offering unique setlists each night, the band has typically donned a "musical costume" and covered another artist's album on Halloween, the most coveted show of the run. In 1998, Phish performed The Velvet Underground's Loaded at the Thomas & Mack. During the band's second local Halloween appearance, at its MGM Grand Garden Arena debut, it tweaked tradition by playing to the day's theme and lending its own mindblowing interpretation to 1964's childhood favorite, Chilling, Thrilling Sounds of the Haunted House. Other cities have seen Phish play albums by The Rolling Stones, The Beatles, The Who and Talking Heads.

The newly announced dates all but officially make a Vegas Halloween run a Phish tradition ... even when Phish isn't actually playing. Last year, the band's singer/guitarist Trey Anastasio performed three dates, including Halloween night, at Brooklyn Bowl.