The BPS US Open starts with a series of regional qualifying rounds on lakes throughout the United States commencing this Spring. The three-day championship will have 350, two-man teams competing on Table Rock Lake.

And to answer your next question as to if Canadians can enter, YES… see below.
WHO IS CLASSED AS AN AMATEUR?

According to the tournament website, an amateur is someone who:
Has not competed as a boater/pro in an MLF Major or BASS Elite Series event within the last two years immediately preceding the BPO event being entered.
Anglers have not ever paid an entry fee greater than $2,500.
Anglers that do not have lifetime earnings greater than $100,000.