Most endurance events, with the exception of the sport of triathlon, focus on a single modality.
Unless you train specifically for many of these events attempting to execute one will likely result in an injury.
The Shield Maiden Endurance Test is a gym based endurance assessment that pushes beyond the 2 hour mark.
For time (or completion):
10k Run
100x KB Curtis P – 16/12kg
10k Row
100x SBGU at 80/60lbs