Walking Trail Ideas

Whereabouts in England will you be?

I'm also not clear what you mean by "National Trust Trails."

Have you already researched the online resources from the National Trust, such as the following?

https://www.nationaltrust.org.uk/walking

https://www.nationaltrust.org.uk/lists/downloadable-walks-in-the-south-east

https://www.nationaltrust.org.uk/lists/coastal-walks

https://www.nationaltrust.org.uk/lists/walks-with-literary-connections

If you mean national trails, the Offa's Dyke path goes past a couple, but generally they don't very much. Offa's Dyke is an unusual one as it is based on a man-made rather than a natural feature and being on a border is the right place for castles. The South West Coast path goes past Tintagel, but I can't recall any others right by the path (though I might be wrong, it's some years since I last walked it).

The Hadrian's Wall path takes you past the ruins of several ancient Roman Forts: Birdoswald and Housesteads are the largest. (This is in northern England, west of Newcastle.) Not quite the same as castles, but really interesting. Housesteads, near the middle of the wall, is easy to get to by car, and you can walk as much or as little as you like in either direction.

You could consider a section of Lady Anne's Way, a new footpath that links several castles ( now mostly in ruins) owned by Lady Anne Clifford.

https://www.ladyannesway.co.uk/

Thanks for all the ideas. The "trails" I was thinking of are the ones from the National Trust. I appreciate the websites and ideas.

Oh, well the NT does have details of short walking trails on some of its sites - you'll need to look at their website and find out more about the site. They own a variety of land and buildings. Some, like bits of coastline, are just land. Some are old houses. So a lot of the National Trust houses might have trails of a mile or two around the gardens or nearby landscape - is that what you mean?

It would still help to know what part of the country you're going to be in!

For several consecutive days of walking, younwill find more options among the National Trails than the National Trust trails.

https://www.rhb.ch/en/panoramic-trains/bernina-express