As many as 1819 people are due to start the Manx Telecom Parish Walk at 8am from the National Sports Centre this morning.
It is a record entry once again and there are a number of road closures and changes to help with safety.
The first is on the main Douglas to Peel route between the post offices at Union Mills and Crosby from 8.20am until 9.30am.
Race Director Ray Cox explains some of restrictions:
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