Wiktionary(0.00 / 0 votes)Rate this definition: 1  opponent(Noun) An individual or group who is a rival of another. 2  opponent(Noun) One who attempts to stop the progression of. 3  opponent(Noun) One who objects to.  opponent(Noun) In team sports, a player of an opposite team.
The fishing season begins the Saturday of Memorial Day weekend (usually the last weekend in May) and extends through and includes the first Sunday in November. Exceptions are noted in each of the Regional Regulations sections within the Fishing Regulations handbook (4 MB pdf).
California trout season is from the last saturday in april to november 15th. But last year dept. of fish and game decided to open some rivers year round to catch and release fishing, that means artificials with barbless hooks only.