It covers approximately 18.4 square kilometres (7.1 sq mi) and is known for preserving the largest undisturbed river-delta system on the island].
The reserve is renowned for preserving the largest undisturbed river-delta system on the island.
[1] The La Poile caribou herd uses the reserve as a wintering ground as it offers shelter and feeding areas.
The reserve encompasses a variety of ecosystems, including freshwater marshes, basin bogs, and shore fens.
These ecosystems support a diverse range of plant species such as sphagnum moss, grasses, sedges, rushes, cattails, water lilies, and various shrubs.