Firestone Walker Brewing Co. has announced the details of its annual anniversary release, this time named XVIII (Eighteen).

In 2006, Paso Robles, Calif.-based brewery. released a limited edition oak-aged strong ale named Firestone Walker X to commemorate its 10th anniversary. The ale was composed of seven different barrel-aged beers that were then blended together. Since that first release, a new anniversary beer has been released every year that blends together different base beers in varying ratios to produce totally unique beers. Each of the beers used for the anniversary release, have been aged, albeit for different times, and in different barrels, and sometimes even stainless steel.

Firestone Walker XVIII

The new XVIII is a blend of nine different beers, with Parabola Russian imperial stout accounting for almost 40 percent of the total recipe. This is the third time in the series that Parabola has been the dominant beer in the anniversary blend, along with XII in 2008 and XIII in 2009.

“The individual lots were aged in oak barrels, many of which were hand selected from premium Kentucky spirits producers by Tom Griffin, who is extremely passionate and knowledgeable about bourbon barrels and beer,” states a press release. “Each barrel lends its own unique influence to the final blend. We blended together 227 oak barrels containing 9 different beers creating something dark complex and 100% original.”

Nine different beers were used for Firestone Walker XVIII.

  • 38 percent Parabola, a Russian imperial stout aged in bourbon barrels.
  • 16 percent Helldorado, a blonde barleywine aged in bourbon and brandy barrels.
  • 16 percent Bravo, an imperial special bitter aged in bourbon and brand barrels.
  • 14 percent Stickee Monkee, a Central Coast Quadrupel aged in bourbon and brandy barrels.
  • 5 percent Velvet Merkin, an oatmeal stout aged in bourbon barrels.
  • 4 percent Hydra Cuveè, a collaboration beer done with Flying Dog Brewery. It is based on Firestone’s Bravo, a bourbon barrel-aged imperial brown ale; DDBA, an English bitter aged in bourbon barrels; Wookey Jack Black Rye IPA and Flying Dog’s Gonzo, an imperial porter.
  • 3 percent Wookey Jack, a black IPA aged stainless steel.
  • 2 percent Ol’ Leghorn, a barleywine aged in new American oak barrels made in collaboration with Three Floyd’s.
  • 2 percent Double Jack, a double IPA aged in stainless steel.

The final blended barrel-aged ale comes in at 13 percent ABV and 35 IBUs. It is being sold in 22-ounce bottles and was released first during events at all five Firestone locations on Oct. 25, before being sent to the brewery’s nationwide distributor network the first week of November.