According to Official Guinness Records,
The fastest half marathon dressed as an awareness ribbon (female) is 2 hr 11 min 10 sec, and was achieved by Shelby Jones (USA) at the Scotiabank Toronto Waterfront Marathon in Toronto, Ontario, Canada, on 22 October 2017.This was one of 13 records attempted at the 2017 Scotiabank Toronto Waterfront Marathon. Shelby ran to raise awareness for mental illness.
For a complete list of 2017 records, please visit 2017 Guinness Records in Canada.