Mr McBride joined Countryfile presenter, Ellie Harrison, for a tour of some of the trees on a section of Offa's Dyke to celebrate the 50th anniversary of the Offa's Dyke Path.
The tree enthusiast and campaigner, from Ellesmere, made his own pilgrimage along the whole of the path, plotting the ancient trees en route.
He returned to some of the spots with the BBC this week, for a programme that is expected to be aired later this month.
One of the highlights was taking the presenter to see some rare trees perched high above Llangollen on the Eglwysegs.
To reach them he and Ellie Harrison had to abseil down the limestone escarpment.
"I haven't abseiled for over 10 years," he said.
"Ellie was really nice, really good fun, as was the director, Erica Jones."
"I am pleased the programme wanted to highlight the amazing trees along Offa's Dyke."
Mr McBride, who runs the not for profit Treespect CiC, has written a book, The Great Trees of Offa's Dyke (Trees, People, Culture) which is due to be published later this year or early next year.
People can pre-register for a copy by emailing email@example.com.