clue #1

[Stoopid]

in oregon, to kick things off with luck, This conpetition always starts the same: With an official screaming loudly, "Let 're buck!" So tell us, what's this competition's name?

[dinsdale]

sounds like rodeo to me

[ezapf]

Does sound like rodeo, but I think Oregon is known for lumberjack competitions. What the connection might be between "let're buck" and lumberjacks - I can't imagine.

[Clanad]

Pendelton, Oregon Round-up rodeo (US)...

[betavo]

i agree with dinsdale deinately rodeo

[toughride]

clanad is correct.

[Dona]

The correct answer is Jefferson County cow weighing competition. Can verify by going to Oregon web-site.