Farmers are flocking through the gates this morning at this year's Fieldays event in the Waikato.
It is expected to be the largest in history.
More than a thousand exhibitors will be eager to showcase their products and services after last year's event was cancelled due to the Covid-19 pandemic. In 2019, there were 1067 exhibitors and 128,747 visitors.
Waikato Police have urged people to be patient heading to the event, with traffic already mounting at Mystery Creek in Hamilton.
"If you’re heading there today check traffic and travel before you leave and ensure you follow directions to the correct car park entry," police said in a Facebook post this morning.
"Please be patient on the roads - especially in the rain and light fog. Travel time from Hamilton is around 45 minutes."
The weather forecast for Fieldays is not looking the best, with showers today and Thursday.
Friday is shaping up to the best day weather wise, while rain descends on Saturday.
Highs across Fieldays range from 15 degrees Celsius to 17.
Fieldays runs from today until Saturday, with the gates open daily from 8am.