Flight Crew Private; Flight Crew Instrument
Flight Crew Last 90 Days 20; Flight Crew Total 2300; Flight Crew Type 1800
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Other / Unknown
Flight Crew Took Evasive Action
Environment - Non Weather Related
While approaching and preparing to enter the traffic pattern at PYM and about four or five miles from the field; we encountered numerous (estimated about fifty) helium filled balloons launched from the ground. We were at about 1200 feet MSL; and had little or no time for evasive action. I believe that these balloons were launched from the ground to celebrate the beginning of the [a] bicycle race. Fortunately; no balloons struck the aircraft. We reported the incident on the UNICOM frequency to warn other aircraft. There was no NOTAM for the event that took place in the vicinity of the airport (Lakeville; MA). Suggest these types of events deserve either a NOTAM or should be prohibited at distance close to an airport.
AA5B pilot reported encountering a large number of balloons in flight that had been released in the vicinity of his destination; PYM.