This is a comprehensive list of all BJCP sanctioned competitions, should be the same as the BJCP list posted above.
American Homebrewers Association Homebrewing Events
Unless it is listed as club-only, they will be open to anyone. Club-only competitions are for beers that have been judged locally, then sent on.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk