Fastest half marathon barefoot on ice/snow

According to Official Guinness Records,

The fastest half marathon ran while barefoot on ice or snow is 2 hr 16 min 34 sec by Wim Hof (Netherlands) near Oulu, Finland, on 26 January 2007.
Done for the Discovery Channel's 'Real Superhumnas and the Quest for the Future Fantastic'.

For a complete list of 2007 records, please visit 2007 Guinness Records in Finland.

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Other Finland records that might interest you:

• Longest cat whiskers
• Greatest distance relay swimming in 24 hours (team)
• Loudest scream by a crowd (outdoors)
• Largest ice fishing competition
• Oldest diving suit