Fastest marathon in an animal costume (female)

According to Official Guinness Records,

The fastest marathon in an animal costume (female) is 3 hr 15 min 39 sec and was achieved by Katie Godof (UK), at the 2016 Virgin Money London Marathon, in London, UK, on 24 April 2016.Katie ran the marathon hoping to spread awareness and raise money for the Cystic Fibrosis Trust.

For a complete list of 2016 records, please visit 2016 Guinness Records in United Kingdom.

Other United Kingdom records that might interest you:

• Fastest marathon three legged (female)
• Fastest time to run the London Marathon (male)
• Fastest road run 30 kilometres (male)
• Fastest marathon in highland dress (male)
• Fastest marathon dressed as a snowboarder
• Heaviest 3D-printed videogame prop
• Most powerful handheld laser
• Fastest marathon dressed as a fairy (female)
• Longest French knitting
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• Most Laurence Olivier awards won by an actress