This was supposed.

This was supposed to be a relaxing hour long loop. It was harder and longer. The ground was hard & cracked on the sea defence dyke which hammered my hands and reduced speed to about 6 mph. Eventually, I got to Tarleton at 6 pm and hungry.
The return was easier on normal tarmac. Anyone thinking of rising this part of the National Coastal Path might consider using front suspension ( if you have that choice).