From Bohus Malmön around the island, the ferry to mainland (time will be stopped), Kungshamn, with finish in Hunnebostrand.
Here you can read more about the course: http://icebugx.com/xperience-ultra/the-course/
The course is a diverse experience, including everything from huge cliffs to narrow forest trails. The course follows the ocean and you will see old fisherman’s villages, heaths, canyons and a huge amount of red-colored granite rocks.