From its own website

Bowman Cellars

Winery in Graton, California

9010 Graton Rd #9364, Graton, CA 95444

Dogs

What Bowman Cellars says about dogs

Dogs allowed: Yes
From its own website, checked 5 Nov 2026bowmancellars.com(source page for Dogs allowed, opens in a new tab)
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“Do you allow pets? Yes, please keep them on a leash and off the furniture.”
Where dogs can go: Not stated

Informational only. Rules change, so check with the winery before you go.