This blue circuit, predominantly straightforward at the start, will lead you through much more physical and demanding paths as the course progresses. You will deviate slightly from circuits 1 and 2 to get closer to the ‘Carrière de la Baleine’, once exploited for its granite, and the ‘Grande Carrière’ when there was a time you would have heard the sound of sledgehammers and quarry-blasting being carried out by 300 workers on this site. This is an ideal route for a good workout, whilst being immersed in the rich history of the place !