According to Official Guinness Records,
The most four-leaf clovers collected in one hour (individual) is 166, and was achieved by Katie Borka (USA), in Spotsylvania, Virginia, USA, on 23 June 2018. Katie decided to break this record because she has always been good at spotting four-leaf clovers.
For a complete list of 2018 records, please visit 2018 Guinness Records in United States.