There’s a new version of Upslope Brewing Co.’s Christmas Ale coming to the brewery’s Lee Hill Series.

Vol 6. Wild Christmas Ale is an 9.2 percent ABV “Belgian-style spiced dubbel” that was aged in Leopold Bros. rye whiskey barrels for 10 months with brettanomyces. The new beer uses the Boulder, Colo. brewery’s Christmas Ale (8.2 percent ABV) as its base. Christmas Ale was first released in 2012 and is brewed with Abbey Ale yeast as well as “holiday spices.”

“Brewing a Wild Christmas Ale is a project I’ve wanted to pursue since I first tasted the Upslope Christmas Ale,” said Sam Scruby, Upslope head brewer, in a press release. “I thought the unique spice character would work well with the funkier elements of brettanomyces imparted by our house sour culture.”

Upslope Lee Hill Series Vol. 6 Wild Christmas Ale

Wild Christmas Ale is the sixth release in Upslope’s Lee Hill Series, which commemorates the original brewery location at Lee Hill in Boulder, Colo. which is now used to produce small batch releases.

To date, there have been five other releases in the series:

  • Vol. 1: Barrel Aged Brown Ale, a 7.6 percent ABV brown ale aged for four months in Leopold Bros. rye whiskey barrels
  • Vol. 2: Wild Saison, a 6.8 percent ABV saison aged for seven months in red wine barrels and was brewed with both lactobacillus and brettanomyces
  • Vol: 3: Barrel Aged Imperial Stout, a 10 percent ABV imperial stout aged in Leopold Bros. Maryland-style rye whiskey barrels for four months
  • Vol. 4: Manhattan Style Rye Ale, a 10.4 percent ABV ale aged in first use Leopold barrels
  • Vol: 5: Belgian Style Quadrupel Ale, a 12.8 percent ABV quadrupel brewed with “a select strain” of Belgian yeast and traditional Belgian candi syrup
  • Vol 6: Wild Christmas Ale, a9.2 percent ABV Belgian-style spiced dubbed brewery with brettanomyces and aged in Leopold barrels for 10 months

According to the brewery, 19.2 ounce cans ($10) of Lee Hill Series: Vol. 6 Wild Christmas Ale will be released at an event on Dec. 3 at the Lee Hill tap room in Boulder, Colo. with a four can per person limit.