The lower and middle portions of the Obatogamau River hydrographic slope can be reached by route 113 which connects Lebel-sur-Quévillon to Chibougamau and the railway; while the northeast side of Obatogamau Lakes is accessible via route 167 and the railway.

The surface of the Obatogamau River is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.

Intermediate part of the Obatogamau River (segment of 53.8 kilometres (33.4 mi)) Townships crossed: De Brochant and D'Anville.

Lower part of the Obatogamau River (segment of 42.8 kilometres (26.6 mi)) Townships crossed: D'Anville, Dolomieu and Saussure.

Of Cree origin, the term "Obatogamau" means "tightened by wood, vegetation".