A crew of about 10 officers were patrolling the site during the day and evicting those who were causing a "dampener" on anyone's day.

Inspector Darren Hopkins said Tasmania Police's role during cup day and any public event was ensuring everyone had a good time.

"We're looking at everything from excessive consumption of alcohol that is causing people to be disorderly and we will impose on them very quickly," he said.

"We're also looking at the licence premises and those that are serving alcohol that they're actually being responsible with their serving."

The police spent their day going in and out of licensed marquees to ensure all rules were being followed.

IN OTHER LAUNCESTON CUP NEWS

"There were problems a few years ago when alcohol was being brought in, but since that has stopped problems like that have decreased significantly," Inspector Hopkins said.

"We have had protest activity out the front. We had to speak to them and make sure they're doing things peacefully and similarly make sure the protesters are safe and not being abused or assaulted by members of the public."

Nine Tasmania Police staff were stationed around the event. Outside of the racecourse, police conducted random breath tests from two sites - High Street and Vermont Road.

All up 680 RBTs were conducted between 4.30pm and 7.30pm, with one person found to be exceeding the legal alcohol limit and one person not wearing a seatbelt.

Police also conducted four illicit drug tests, with one person testing positive.

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