Vätternrundan is a 315 km (196 mi) (300 km (190 mi) before 2020) cyclosportive event held annually over two weekends in June in Sweden. In 2011, 27,973 cyclists passed the finish line; 18,272 on the 300 km (190 mi) course, 3,686 on the 150 km (93 mi) course, and 6,015 on the 100 km (62 mi) course). The 315 km course circles Lake Vättern, starting and finishing in the town of Motala. Approximately 20 percent of the participants are non-Swedish and in 2011, 37 nations were represented on the course.
https://en.wikipedia.org/wiki/V%C3%A4tternrundan