The Kouchibouguacis River, whose name translates to "Little Sister of Kouchibouguac," flows through the Maritime Lowlands of northeastern New Brunswick, emptying into the coastal waters of Kouchibouguac National Park on the Northumberland Strait. The park itself encompasses 238 square kilometres of the Maritime Lowlands ecological region, situated roughly 80 kilometres north of Moncton and 50 kilometres southeast of Miramichi. A defining characteristic of this lowland landscape is that tidal influence extends inland for many miles along the rivers, which shapes the paddling experience considerably.

A documented route runs approximately eight kilometres from the town of Saint-Louis-de-Kent downstream to Pointe-à-Maxime, where the river meets the coast. Kayakouch Outdoor Adventure Shop, located on Main Street in Saint-Louis-de-Kent, serves as a practical base and put-in point for this run. The takeout at Pointe-à-Maxime sits at the river's mouth, where Kouchibouguac National Park maintains a primitive campground with several campsites reserved specifically for paddlers. Facilities there include an outhouse, fire pit, and picnic table, though all potable water and supplies must be brought in by boat.

Wind is a notable safety consideration in this coastal environment. Conditions can build quickly — gusts reaching 35 knots have been recorded — and paddlers should monitor weather forecasts carefully before and during any trip. Checking a weather radio regularly is a recommended practice in this area.

The river corridor and adjacent lagoon system offer access to notable wildlife, including common terns and grey seals. The surrounding landscape is a mix of deciduous and boreal coniferous forest typical of the Maritime Lowlands. The broader Kouchibouguac National Park area, which the river flows through, was established as a reserve in 1969 and received official national park status in 1979, meaning paddlers should be aware that national park regulations apply within park boundaries.