[10][11] Kakuchuya Creek originates in the Level Mountain Range, a cluster of bare peaks on the summit of the massive Level Mountain shield volcano, which forms the most voluminous and most persistent eruptive centre in the Northern Cordilleran Volcanic Province.

[15][2][16][17][1] From its source Kakuchuya Creek flows west through a large U-shaped valley glacial valley carved into Level Mountain's high and relatively barren lava plateau, then through the high the western escarpment of Level Mountain.

As the creek continues flowing west through the Nahlin Plateau, it collects numerous unnamed tributary streams.

From its confluence with Matsatu Creek, Kakuchuya Creek flows west for about 1 km (0.62 mi) to empty into the Dudidontu River, about 8 km (5.0 mi) southwest of Hatin Lake on the Koshin River, near the locality of Callison Ranch.

[24][2][16][17] The historic Yukon Telegraph Trail follows the lower, northern portion of Kakuchuya Creek.