The plural of regatta is regattas.
Regatta is an event not a colour
Molesey Regatta was created in 1867.
Sonning Regatta was created in 2000.
Poughkeepsie Regatta was created in 1895.
Chertsey Regatta was created in 1851.
Egham Regatta was created in 1909.
Maidenhead Regatta was created in 1893.
The Regatta Mystery was created in 1939.
Kingston Regatta was created in 1857.
Barcolana regatta was created in 1969.
Madison Regatta was created in 1950.