Lake Carrot is a 3.4 hectare dune lake, located near Waipapakauri. It is part of the Sweetwater dune lake system. Lake Carrot has a maximum depth of 7.9 m and has no surface water inflows or outflows. The catchment is dominated by pasture and forestry. The lake contains good native charophyte meadows however the invasive oxygen weed (Egeria densa) is now present in the lake and both water quality and ecological impacts are likely if eradication is not achieved (source lawa.co.nz).