Great Prosser Balloon Rally 2024. The 35th annual great prosser balloon. As many as 19 balloons are expected to participate in the 35th annual event at the prosser airport.

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. 12,592 likes · 1,777 talking about this · 5,094 were here.