Yes, CORRIDAS is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, R 1, R 1, I 1, D 2, A 1, S 1.

Is it a valid word?

CORRIDAS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators