This is a huge event on the bikini contest circuit with thousands of dollars in prizes.
The NOPI Nationals Swimsuit Contest is one of the top swimsuit competitions in USA. Girls are competing for the title of MISS NOPI NATIONALS.
The annual event is held at the NOPI Motorsports Supershow at the Atlanta Motor Speedway.
The competition has strict rules on which type of bikinis you can wear. Only triangle tops are allowed, no bandeau or band aid types of bikinis allowed. No thongs either. In addition, the event is PG rated so you must take note of these rules:
1) No suggestive or derogatory actions.
2) No dancing or booty shakes.
3) No attitudes are accepted! Cattiness not allowed!
Links to Photos from the event
More at Jalopnik's Nopi photos (Flickr)
CarandModel.com also have a huge gallery of Nopi photos.