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Colorful hot air balloons at sunrise rally.

Great Prosser Balloon Rally

September 25 - September 27
Crowded street at Harvest Festival with tents.

Harvest Festival

September 25 - September 27

Events for September 7, 2026

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99th States Day Celebration parade participant waving

99th Annual States Day Celebration

Prosser City Park 1328 Sommers Avenue, Prosser

States Day Celebrating 99 years of Community in Prosser with New and Old Traditions Prosser's oldest community event, "States Day" will be held on Monday, September 7th 2026, and offers…

Happy Hour at the Winemakers Loft

June 5 @ 5:00 pm - July 31 @ 7:00 pm

Alexandria Nicole Cellars Freedom Flight July

July 1 - July 31

HAPPY HOUR EVERY DAY AT BILLS SPEAKEASY

July 29 @ 2:00 pm - August 31 @ 8:00 pm

Wine Down Wednesday @ Evergreen Family Wines

July 29 @ 3:00 pm - 6:00 pm

HAPPY HOUR EVERY DAY AT BILLS SPEAKEASY

July 30 @ 2:00 pm - September 1 @ 8:00 pm

Trivia Night at McKinley Springs

July 30 @ 5:00 pm - 7:00 pm

Thursday Night Vibes: Wine, Dine & Unwind @ Evergreen Family Wines

July 30 @ 5:00 pm - 8:00 pm

Ben Rice & the PCX Hustle

July 30 @ 7:00 pm - 9:00 pm

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