Longest marathon on a fairground/theme park attraction

According to Official Guinness Records,

The longest marathon on a fairground/theme park attraction is 50 hours riding and was achieved by Sam Clauw (Belgium) at Bellewaerde, Ypres, Belgium, on 1 May 2014.

For a complete list of 2014 records, please visit 2014 Guinness Records in Belgium.

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Other Belgium records that might interest you:

• Most swim caps worn at once
• Fastest 100 km on a treadmill (team)
• Most grapes caught in the mouth in three minutes
• Most cosmetic makeovers in 24 hours (team of five)
• Fastest road speed skate 200 m (female)
• Fastest track speed skate 10,000 m (male)
• Longest sausage chain