It starts in a historic Gwynedd church that's home to the "Crying Knight" and a four-sided tombstone with the earliest known written Welsh. The finale is a boat trip from Porth Meudwy over to Ynys Enlli to explore the island's spiritual past.
Last week the Llwybr Cadfan trail was named one of Europe's "eight best hikes you haven't yet tried" by the i newspaper.
Regardless of faith, this is a spectacular, uplifting walk that nourishes the soul if not spirituality.
Developed by the diocese of Bangor and the Church in Wales, the route aims to elevate Wales' sacred sites to the prominence of destinations such as Lindisfarne and Iona.
Among the first to walk part of the route was the Archbishop of Wales, Andrew John, who said pilgrimages were becoming more popular and this latest addition had the potential to provide "life-changing" experiences. He said: "With the success of programmes such as BBC's Pilgrimage, we have seen more and more people explore their spirituality by walking ancient pilgrimage routes and visiting churches and holy wells as they seek answers to life's problems.
"The Llwybr Cadfan pilgrimage is an opportunity for individuals to step away from the hustle and bustle of everyday life, experience the tranquillity of nature, spend time with God in prayer and reflection, and return home with a renewed sense of peace."
Designed to be walked over 12 days, Llwybr Cadfan offers people the chance to follow in the footsteps of 6th-century St Cadfan, who established an abbot-led community in Tywyn and a monastery on Ynis Enlli (Bardsey Island).
Along the route, as it winds through unspoilt landscapes to the tip of the Llyn Peninsula, there are 17 historic churches and six holy wells.
The starting point is St Cadfan's church in Tywyn, which dates from the 12th century. Sacked by Vikings in 963, its tower was rebuilt when the original collapsed in 1693.
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As well as housing the 7ft Cadfan stone, the church has an effigy known as the "Crying Knight". Thought to be that of Gruffudd ab Adda, who died around 1331, the stone effigy has a flaw in its right eye: during we...