The Thirsty Troll Brew Fest – at Grundahl Park, 401 Blue Mounds Street, Mount Horeb – is an intimate beer sampling that features 25 craft brewers serving over 100 different beers. Live Music. Get your picture taken with Jorgen the Thirsty Troll! Festivities September 9, run from 1-5pm on Saturday. Don’t miss this signature event in Mount Horeb.