Flakstadelva is a river in Innlandet county, Norway. The 32.6-kilometre (20.3 mi) river begins in the Lavsjømyrene bog areas in northern Løten. From there it runs in a southerly direction and forms the lake Nybusjøen which discharges into the Lundsbekken river. The river flows in a v-shaped valley which twists before its mouth at the town of Hamar where it empties into the lake Mjøsa.[1] The river's erosion has exposed the lower Cambrian and middle Cambrian rock formations in that region.[2]