Over 600 people are getting involved in the event online through Twitter.
If you are unable to take part, you may like to make a donation, or join the event in spirit – by interacting on Twitter via @LoveSWCoastPath.
Here is just some of the interaction over the last ten days since the event began:
Jeremy Nottingham (@BizMentor_Glos): April 3: @LoveSWCoastPath Good luck, look forward to tracking your progress. What a beautiful morning to start!
Ken Carter (@KENCARTER14): April 3: @LoveSWCoastPath Scuppers leads off the first leg of the trip to Lands End – Spot the Boot competition!
Visit Cornwall (@ILoveCornwallUK): April 3: @LoveSWCoastPath Wishing all walkers well for todays start of the Great South West Walk – Cornwall awaits #love2walk
VisitEngland (@VisitEngland): April 3: Celebrating 40 yrs! The Great South West Walk walks (South Haven Point-Land's End) start today
Pete Scupholme (@scuppersdorset): April 3: @LoveSWCoastPath tea break and shelter at Dancing Ledge for 22 #Love2Walk great day
Pete Scupholme (@scuppersdorset): April 3: @LoveSWCoastPath on the march along Studland Beach on bright cold morning #Love2Walk
Cornwall AONB (@CornwallAONB): April 3: The Great South West Walk is on! Help raise £250,000 for improvements to the South West Coast Path.
The Badger (@Badgerales): April 4: We're limbering up for our walk tomorrow @LoveSWCoastPath – don't forget to join our tag and brag competition
Seasalt Cornwall (@seasaltclothing): April 4: Get out on the sw coastal path! 56 walks over 630 miles to celebrate 40 yrs!
Great SouthWest Walk (@LoveSWCoast Path): April 5: Whooop! We've reached 630 followers – 1 for every mile of the SouthWestCoastPath as we celebrate our 40th birthday. Thank you.
WalkKernow (@Walkkernow): April 6: @LoveSWCoastPath Good luck guys looking forward to joining you on the 28th!!
Great SouthWest Walk (@LoveSWCoast Path): April 6: It's not too late to register if you'd like to join one of our relay legs. Dates and locations on our website. Takes in entire SW coast.