If you love German and Bavarian beers, you no doubt love the Hallertau hop variety as well. Born in the Hallertauer region of Bavaria, Germany, Hellertau is found most commonly in German lagers, altbiers (German style brown ale), and Belgian ales.
Hallertau is one of four noble hops (also including Saaz, Spalt, and Tettnang), meaning that it grows in the wild rather than is selectively bred. German hop researchers continue to tinker with the hop, creating a variety of strains. Hallertau slightly fell out of favor in the '70s and '80s because of its high susceptibility to disease, but the hop is essential to a large number of European-style brews. The most commercial craft brewery to popularize Hallertau is Boston Beer Co.'s Samuel Adams, which uses the Hallertau Mittelfrueh hop in a large number of its lagers.