The church is situated in an isolated position, surrounded by open farmland on the eastern coast of the island, between Groudle Glen and Baldrine.
[1] The eastern (and oldest) part of the church has been restored, but it is otherwise in a ruinous, though well-tended, condition.
The church yard contains Celtic crosses, the oldest of which dates backs to the 5th century AD - evidence of an early keeill.
[2] On 25 June 1733, an Act of Tynwald was passed for the building of a new parish church at Boilley Veen, in a more convenient part of the parish,[3] but the new church was not in fact completed until a hundred years later.
St Adamnan's fell into disrepair, but was restored by the Reverend John Quine, who became vicar of Lonan in 1895.