There is a small section of the south west coast path (SWCP) that actually goes away for the Tarka trail. That section can be walked by parking at sandhills car park, Marine Parade, Instow, Bideford EX39 4LF. Then walking along the coast to Yelland then connecting up with the Tarka Trail to do a cycle. Sandhills car park has a bad reputation of fining car even when they have not even managed to park so beware.
We turned round at Bideford railway heritage centre.