The river flows from north to south for almost between the Natashquan River in the west and Musquaro River in the east. The river flows for about through the hills, then meanders through the swampy lowlands before flowing into the Gulf of St. Lawrence. There are several rapids and waterfalls. In the downstream section it flows through Lake Kegaska, which is long and covers. It then meanders down into the marshes of the coastal plain. The mouth of the river is in the unorganized territory of Petit-Mécatina in the Le Golfe-du-Saint-Laurent Regional County Municipality. Natashquan is about west of the river mouth. The small village of Kegashka and the harbor of Kegaska are further east at the other end of Kagaska Bay. The sandy beaches are known as an area to observe birds and marine mammals, and to gather clams. In early 2009 a new long steel bridge was built over the river. It was needed to carry machinery for construction of an almost section of Quebec Route 138 between Kegaska and the Natashquan River.
Name
The Innu call Kagaska Bay Tshekahkat and call the river Tshehkahkau Hipu. These could be variants of the word tshakashekau meaning "rocky escarpment with a steep slope at its summit". Père Arnaud says Kegasta means "bay on each side of the point". Eugène Rouillard, in Noms géographiques de la Province de Québec et des Provinces Maritimes empruntés aux langues sauvages, says it means "a peninsula". Another source says "kegaska" comes from the Innu word "quegasca" which means "a shortcut or easy passage at high tide between the mainland and the islands".
Description
According to the Dictionnaire des rivières et lacs de la province de Québec,
Basin
The river basin covers. It lies between the basins of the Natashquan River and the Musquaro River. It covers part of the unorganized territory of Petit-Mécatina and part of the municipality of Côte-Nord-du-Golfe-du-Saint-Laurent. Part of the basin is in the proposed Natashquan River Valley Biodiversity Reserve. A map of the ecological regions of Quebec shows the river in sub-regions 6n-T and 6m-T of the east spruce/moss subdomain. Along the river the vegetation is sparse due to the harsh climate and strong winds, and in some areas the gneiss and granite bedrock is exposed.
Human use
In the past the Innu used the Kégaska River as a transportation corridor, then as a trade route during the fur trading period. In 1702 Augustin Le Gardeur de Courtemanche obtained a concession for hunting and fishing extending from the Kegaska River to the Kessessakiou River. Seal and whale oil were much sought after during this period for lighting. In 1831 the Hudson's Bay Company occupied a salmon fishing and trading post at the mouth of the river. The Kegaska River provides excellent habitat for Atlantic salmon, which can use of the river and tributaries. Sport fishing by boat or wading is practiced on the lowest in four pools that are influenced by the tides. The average weight of salmon caught is. The Leslie Foreman Fishing Club, named after a family from Nova Scotia who settled there in 1855, holds the exclusive fishing rights to the portion of the river up to Lake Kegaska, which is about from the estuary. The first cabins of the Leslie Foreman outfitter are at the mouth of the river. The outfitter also has a cabin northwest of Kegaska near Lake Kegaska. This cabin could be reached by boat, but many portages would be needed. It is easier to reach the lake by float plane.
