Lac Assinica is a lake within the Broadback River watershed in northern Quebec, located inside the expansive 8,885 km² Assinica Wildlife Reserve. The name originates from the Cree word "asinikaw," meaning "it's stony" or "it's rocky," which describes the rugged terrain of the surrounding area. Access to the reserve, and therefore the lake, is managed through a reception station located on Route 167 North, approximately 20 kilometers north of Chibougamau. Paddling here is primarily a wilderness canoe-camping experience, requiring advance planning. Written requests for access must be submitted at least one month in advance, and access is restricted, subject to conditions and availability. A weekly draw governs access to certain featured lakes within the reserve. Paddlers must be aware that canoe-camping and fishing are managed separately; a standard canoe-camping permit does not include fishing rights, which require an additional access purchase.

The overall character is one of remote, rugged wilderness. The lake is part of a network of countless lakes and rivers carved by the Broadback River across a rocky landscape. The primary activities are exploration and fishing, with walleye, lake trout, brook trout, and northern pike present in the waters. While Lac Assinica itself is noted, the reserve's featured fishing destinations are specifically named as Comencho, Cachisca, and Opataca lakes. Rustic camping is available, including on the shores of Lac Cachisca. Facilities are minimal, aligning with a rustic experience, and children under 18 years old access the reserve for free. The best time for paddling is not specified, but the operational model of the wildlife reserve suggests a summer season. The water body's aesthetic is defined by its stony, rocky shores and its setting within a vast, untouched boreal landscape.