The Raad ny Foillan, or 'Road of the Gull' footpath, is 95 miles
It can be walked in 5 days although you may want to allow a bit longer.
The footpath is clearly marked with a gull on a blue sign, and mainly follows the coast of the Island.
The trail was created to mark the Heritage Year Celebrations in 1986.
The Isle of Man Government produce a Raad ny Foillan Coastal Footpath Guide which can be downloaded here.