The Alpine Village event begins at 5 p.m. and features $5 pints.

Here’s more from the typically over-the-top Stone press release:

Our 19th anniversary beer brings the boom, delivering it to the palate in a voluminous, hop-driven thunderclap backed by the power of our brewing passion and intensity. This double IPA owes its considerable oomph to a quartet of Australian hops—Topaz and Galaxy, plus newcomers Ella and Vic Secret. We also had Fairview malt shipped in from Australia just for this brew. The beer’s striking tropical fruit, citrus and peach hop flavors and slightly resinous and aromatically dank earthiness are sure to electrify your senses.

We have many special beers planned for release to celebrate our 20 years of brewing, so let this serve as the first course to what will be an undoubtedly epic feast for craft beer enthusiasts, with particular thanks to those who’ve been with us for the long haul and helped us attain such longevity.

Also on tap from Stone at Alpine Village: Ruin Ten Triple IPA, Imperial Mutt Brown Ale, Arrogant Bastard, Stochastisity Hifi + Lofi Mix Tape and Go To Session IPA.