On day two, Michael will begin his walk at the Agatha Christie statue in Torquay and will follow the Agatha Christie mile.
He will be accompanied by Matt Newbury, creative director of the international Agatha Christie Festival.
In the afternoon, he will walk from Paignton harbour to Torbay Velopark.
Meanwhile, Caroline will be walking along the Sutton Harbour trail in Plymouth, along the Hoe and to Royal William Yard. Later she is due to walk 12.6 laps around the athletics track at Foulston Park, Devonport.
Caroline said the presenters would be visiting some wonderful places.
“I’m genuinely looking forward to it, if not completely terrified,” she said.
