The Todd River is an ephemeral river in the southern Northern Territory, central Australia. The origins of the Todd River are in the MacDonnell Ranges, where it flows past the Telegraph Station, almost through the center of Alice Springs, through Heavitree Gap at the southern end of Alice Springs and continuing on for some distance, passing through the western part of the Simpson Desert, as it becomes a tributary of the Hale River, and eventually flowing into Lake Eyre in South Australia. The indigenous Arrernte people know this river as Lhere Mparntwe (pronounced ler-ra m-barn-twa). The Todd is in a very arid part of Australia and has zero to very low flow during 95% of the year. When it does flow, it carries a heavy sediment load picked up from the grazing land around the Bond Springs homestead which lends its waters a milky chocolate colour and renders them completely opaque. The river was named by surveyor W. W. Mills after Lady Alice Todd (née Alice Gillam Bell), wife of Charles Todd, previously Postmaster General of South Australia.