Mr Speirs says a landowner whose property adjoins the Karioi forest park alerted DOC to the situation when three people ignored his advice not to enter the area. People continued to visit nearby Bridal Veil Falls, as well.
DOC staff have relayed the information to police.
Waikato District Mayor Allan Sanson, said people ignoring the Government's advice put themselves and others at risk.
"Not only are these tracks narrow in places – meaning you can't keep that 2m social distance – if you get into trouble and need to be rescued, you're putting other people in harm's way."
"Stay at home and exercise in your immediate area: jumping in the car and heading off to go tramping or walking isn't acceptable," Mayor Sanson says.