The race, which began in Ipswich last Sunday (September 9) and ends in Guildford this weekend, will see Olympic medallists Bradley Wiggins and Mark Cavendish battling to win.
Stage seven of the race begins in Barnstaple and the Devon stage will cover around 106 miles. It is estimated that after leaving Okehampton, the cyclists will reach Lydford on the A386 at 12.04pm, Tavistock at 12.21pm, where riders will descend on Drake Road, across the square and the bridge before heading out along Dolvin Road and along the B3357 to Merrivale at 12.38pm, Princetown at 12.40pm and Poundsgate at 1.01pm.
Crowds are expected to line the route and there are celebrations and activities planned for Tavistock and Princetown.
This international cycling event receives global television coverage and is broadcast nationally on ITV4.
As the Times went to press yesterday (Wednesday), Mark Cavendish had taken victory in the third stage in Scotland, placing him second overall.