Or “The Mountain Course”, is a 37.75 mile clockwise loop through four towns, six or ten villages, half-a-dozen roundabouts (taken straight), and a windy wild climb up – and down – a soaring road over the spine of the island.

For the racers, every straight of any length is a chance to gain a slice of a second. If you’re not, the others will. Speeds around the whole are running near 120mph average.

We ran it this morning, before breakfast for a clearer route, and I’d forgotten the first mile by Union Mills.