ContactEnjoy our great food and fun atmosphere At El Mariachi Mexican Restaurant, you'll always find a great time and great food! We're a local favorite with the best margaritas in town, outdoor dining, and multiple locations! Watertown1694 S Church St Watertown, WI 53094 1-920-261-0200 Lake Mills 102 E Madison St Lake Mills, WI 1-920-648-2985 PhoneLake Mills: 920-648-2985Watertown: 920-261-0200 Prepare The Best DishesOUR RESTAURANT AND THE FOOD THEY SERVE THEIR GUESTS