Fastest marathon on stilts

According to Official Guinness Records,

The fastest marathon on stilts is 6 hr 37 min 38 sec and was achieved by Michelle Frost (UK) at the Virgin Money London Marathon, in London, UK, on 22 April 2018.This was the eleventh year that Guinness World Records has partnered with the London Marathon.

For a complete list of 2018 records, please visit 2018 Guinness Records in United Kingdom.

Other United Kingdom records that might interest you:

• Fastest marathon in a full-body animal costume (female)
• Largest game of musical bumps
• Most pine boards broken in one minute with one hand (female)
• Fastest marathon wearing flip flops
• Oldest person to ride a zip wire (zip line)