Is it also referred to as Magura, or is that another park?
Magura is the mountain near Szczyrk - about 200 km to the west from Magurski National Park but there is also something called Magura Wątkowska, which is inside the park and includes 4 mountains or rather hills.
The main part of the Park covers the ridge of Mt Magura Wątkowska, culminating at Mt Wątkowa (847 m.). Northern slopes of the ridge are cut through by the Bednarka and the Kłopotnica streams.
ilovepoland.pl/travel_assistant/what_to_visit/national_park s/magura_national_park