12th Annual O’Connor’s West Michigan Brew Off Sponsors

Siciliano's Market

3880 Lake Michigan Dr NW, Walker, MI 49534

Homebrew & Winemaking Supplies, Craft Beer, Cigars, Pipes & Tobacco, Wine & Spirits, Bulk Coffee, Loose Tea & More.

The Mitten Brewing Co.

527 Leonard St NW, Grand Rapids, MI 49504

The Mitten Brewing Co. is a vintage baseball-themed microbrewery that expertly pairs handcrafted beers with gourmet pizzas.

Third Nature Brewing Co.

7733 Childsdale Ave NE, Rockford, MI 49341

Where craft beer meets nature.

Rivertown Homebrewers

Rivertown Homebrewers is an AHA registered homebrew club located in the Grand Rapids area.

Adventures In Homebrewing - Northern Brewer

Amoretti

Oxnard, CA

The premium ingredient company.

BSG HandCraft supplies the home fermentation industry and small commercial producers with select ingredients and supplies from around the world. Over the years, our focus on quality and service has earned us the reputation for delivering the best products at competitive prices without sacrificing customer service.

BYO Magazine

Manchester Center, VT

The how-to homebrew beer magazine.

Great Lakes Hops

Zeeland, MI

Great Lakes Hops offers a huge collection of select, fully rooted hop plants.

INKBIRD

Lallemand

Specializing in the highest quality yeasts & expert support!

Omega Yeast Labs

Chicago, IL

CRAFT YEAST FOR CRAFT BREWS! High quality, pitch-ready liquid yeast for Probrewers and Homebrewers.

Spike Brewing

Milwaukee, WI

Homebrew equipment manufacturer. It's More Than Just Beer.

Tilt Hydrometer

Wireless hydrometer and thermometer for real-time monitoring of beer and wine fermentation.

Wyeast

Hood River, OR

A passion for fermentation. The place we call home inspires us. Hood River, Oregon, is tucked away where Mt. Hood meets the Columbia River Gorge. We create our products for brewers, wine makers, cider makers, distillers, and other enthusiasts to reflect the purity and reliability these landmarks represent. This region is rich in craft beverage and fermentation culture, and home to some of the best breweries and wineries in the world. Since 1986 we've been leading the way by providing premium fermentation products.

Launch Awards Presentation

Judging Sessions

Judging Session Zero
10/15/2025 6:00 PM, EDT.

Judging Session One
10/18/2025 9:00 AM, EDT.

Judging Session Two
10/18/2025 12:00 PM, EDT.

BOS Judging (Best of Show)
10/18/2025 2:30 PM, EDT.

Account Registration Closed

Account registrations accepted 08/10/2025 8:00 AM, EDT through 10/15/2025 6:00 PM, EDT.

Registrations for judges or stewards accepted 08/10/2025 8:00 AM, EDT through 10/18/2025 8:00 PM, EDT.

Entry Registration Closed

Entry registrations accepted 08/16/2025 2:00 PM, EDT through 10/15/2025 6:00 PM, EDT.

Entry Drop-Off Closed

Entry bottles accepted at drop-off locations 09/19/2025 8:00 AM, EDT — 10/05/2025 8:00 PM, EDT.

Please pay attention to the notes provided for each drop-off location. There could be earlier deadlines for some drop-off locations listed, particular hours when entries are accepted, certain individuals to leave your entries with, etc. All entrants are responsible for reading the information provided by the organizers for each drop-off location.

Entry Shipping Closed

Entry bottles accepted at the shipping location 09/19/2025 8:00 AM, EDT — 10/05/2025 8:00 PM, EDT.