From its own website

Mongata Winery

Winery in Milton-Freewater, Oregon

81768 S Fork Walla Walla River Rd, Milton-Freewater, OR 97862

Dogs

What Mongata Winery says about dogs

Dogs allowed: Yes
From its own website, checked 5 Nov 2026mongatawinery.com(source page for Dogs allowed, opens in a new tab)
Show the exact wordsHide the exact words
“Dogs are welcome, and must be on a leash without exception.”
Where dogs can go: Not stated

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