As a Cornishman, I thoroughly recommended the Cornish Coastpath trail in the infographic below! There’s the trail from Perranuthnoe to Porthleven, but from my experience of hiking around, you can make your route even better by extending it from Perranuthnoe. Later on, I’ll let you in on some personal preferences, when you head down towards Sennen or even Landsend.
Although, as a general note, Cornish coastal paths are pretty muddy during the winter months, so be sure to be equipped and prepared for it before you head on a hike.
Conveniently, the infographic made by https://www.slatergordon.co.uk/personal-injury/ mentions quite a few bits of advice for you to reference when you go on a hike.
It would certainly help if you chose footwear that’s not only supportive but also waterproof and has a deep tread. Clothing wise, it is definitely sensible to not only layer up but to wear waterproof clothing so you don’t get drenched in the (often rainy) British weather.
I’ve now walked most of the Cornish Coast Path in its entirety and can say that so far the area between St Ives and Sennen has got to be one of my favourite stretches. The famous engine houses on this stretch make this part incredibly enigmatic and will be recognised by anyone that’s watched Poldark! This trail makes quite a nice day walk or alternatively for a shorter trip you could park in Sennen and make your way across some very dramatic scenery to Landsend.