The B3232 is partially blocked due to fallen power cables and an overturned car around the turn for Huntshaw.
Police advice is to use the A roads between Torrington and Barnstaple instead.
More top news
A minute's applause will take place during the Army-Navy rugby match in memory of Captain David Seath, who died during the marathon.
RNLI lifeguards will start patrolling beaches in the region this weekend as the 2016 summer season get underway.
People living in Totnes are celebrating after winning their three year legal battle, against the controversial traffic system