Challenge Roth is a triathlon race organised by in and around Roth, Germany. It is held annually in July.
The course is an Ultra Distance, which is a total of 140.6 miles / 226.2 kilometers.
The first part of the race, the 3.86 km swim event, takes place in the Rhine–Main–Danube Canal around 10 km outside Roth.
The subsequent 180.25 km bike course uses a two-lap course on the countryside, mostly south of Roth. The southernmost point is Greding. The course is mostly relatively flat with a tougher hill once per lap.
The final marathon run goes once around a course with several turning points. Mostly the course goes on the same road after each turning points, so competitors meet each other. A major part of the course is along the Rhine–Main–Danube Canal. The finish is in central Roth.
The race has been held since 1990 on the Ironman distance, and since 1984 on short distance. It was formerly part of the Ironman series, until 2001. It has been held independently from WTC since 2002. The number of participants is around 3500 individuals and 650 relay teams, limited by crowding.