Estes appeared in Grand Traverse Cistrict Court on Monday, less than two weeks after his arrest on a drunken driving count. He pleaded guilty to a lesser charge.
The 63-year-old mayor was pulled over Oct. 23 after a candidates' forum. Police spotted his pickup truck weaving across turn and bike lanes on a downtown street. A breath test recorded a blood-alcohol content of 0.12 percent, exceeding the 0.08 percent legal limit for driving.
Estes could get up to 93 days in jail. Judge Michael Stepka ordered an examination of the details of Estes' drinking.
Estes is seeking re-election today. He has asked for the public's forgiveness.