Petaluma's Artisan Bakery & Grocery
From our oven to your table — house-fermented breads, buttery pastries, and a carefully selected grocery counter celebrating Northern California's finest producers.
Find Our Shop
Our Story
Ultramarine began as a conviction: that the bread on your morning table should taste like something made by a person who cares. Nestled on Holm Road, we've built a space where the ritual of slow fermentation meets the rhythm of a neighborhood grocery.
Every loaf is mixed, folded, and baked in-house using naturally leavened starters. Our grocery shelves carry small-batch preserves, local olive oils, and pantry staples from Sonoma and Marin producers we've tasted and trusted.
From the Bakery
Everything we bake arrives fresh each morning. Our grocery case rotates with the seasons, featuring products from farmers and artisans we know by name.
Signature Bread
Our 72-hour fermented hearth loaf — thick, crackling crust with an open, tangy crumb. Baked fresh every morning.
Pastry
Laminated by hand with French-style butter. Flaky, golden, and layered — the kind that crumbles onto the counter.
Grocery
Small-batch preserves, local olive oils, aged vinegars, and artisan salts — selected from producers across the Bay Area.
Every loaf and pastry is made from scratch each morning. Nothing day-old, nothing frozen — just fresh bread, every day.
We partner with farms and producers throughout Sonoma and Marin counties, ensuring every ingredient tells a local story.
Our naturally leavened starters are fed and maintained in-house. No commercial yeast, no shortcuts — just time and technique.
Beyond the bakery case, discover a rotating selection of artisan foods, regional wines, and pantry essentials from local makers.
Visit Us
Address
1240 Holm Rd
Petaluma, CA 94954-1200
Phone
Hours
Monday – Friday: 7:00 AM – 3:00 PM
Saturday: 7:00 AM – 2:00 PM
Sunday: Closed
Get in Touch
Whether you're planning an event, exploring wholesale partnerships, or simply want to know what's fresh today — we'd love to hear from you.
