The XVI Mondego River Open Water Tournament is a river swim in Coimbra, Portugal, taking place on the Mondego River as part of the National Open Water Circuit. The main event is a 3000m official circuit race for Portuguese Swimming Federation open-water and Masters swimmers, requiring a minimum age of 14 and having a 1 hour 30 minute time limit. Shorter 1000m and 400m promotional swims are also offered, broadening participation beyond the main ranked race.
The competition adheres to Portuguese Swimming Federation regulations and World Aquatics open-water rules. Consequently, wetsuit use is determined by the official water-temperature reading. Results from the 3000m race contribute to national circuit standings. Classifications and awards will be presented to overall swimmers, age groups, and teams in both Open Water and Masters categories. Timing and registration are managed by Multicrono, which also handles entries for the broader circuit.