Prosser Wa Balloon Festival 2024 Dates. Prosser — the great prosser balloon rally is back for its 35th annual event, with hot air balloons set to launch from the port of benton’s prosser airport. The great prosser balloon rally.
Gather around, adventurers and dreamers, for an ethereal journey awaits at the prosser balloon festival! Hot air balloons take to the sky at the great prosser balloon rally.