According to Official Guinness Records,
The tallest sit-down hydrofoil ridden is 4.21 m (13 ft 10 in), and was achieved by Geno Yauchler (USA) in Winter Haven, Florida, USA, on 28 April 2018. Geno chose to break this record because he is an avid hydrofoiler.
For a complete list of 2018 records, please visit 2018 Guinness Records in United States.