he main Boudin Bakery in San Francisco is in the Richmond District on the corner of 10th Avenue and Geary Boulevard. The bakery still uses the same starter yeast-bacteria culture it developed during the California Gold Rush. Boudin Bakery is a bakery known for its sourdough bread. It was established in 1849 by Isidore Boudin, son of a family of master bakers from Burgundy, France, by blending the sourdough prevalent among miners in the Gold Rush with French techniques. Isidore Boudin was an observant baker, with a keen understanding of how ambient conditions such as mist affect the leavening and baking process. San Francisco has a bacterium especially well suited for sourdough: Lactobacillus sanfranciscensis. The bakery has locations on Fisherman's Wharf, Disney California Adventure Park, and 30 other cafés scattered throughout California.