The Adcock River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in the Kimberley of Western Australia

Western Australia

Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

.

The headwaters of the river rise in the Philips Range near Qodesh then flow in a south easterly direction parallel with the King Leopold Range and past Mount House, Mount Clifton and Mount Hamilton before merging with the Fitzroy River

Fitzroy River (Western Australia)

The Fitzroy River is located in the West Kimberley region of Western Australia.-Discovery:The Fitzroy River was discovered by the West in 1837 by George Grey in the H.M.S. Beagle. The river was subsequently named by Lt J L Stokes on 26/2/1838 after Captain Robert FitzRoy R.N...

 near Fitzroy Bluff.

The Adcock has three tributaries

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

; Throssel river, Annie Creek and Walsh Creek.

The first European to discover the river was Frank Hann

Frank Hann

Frank Hugh Hann was an explorer in Western Australia, who in 1897 named Lake Disappointment. Hann was in the area exploring the east Pilbara, around Rudall River. He noticed creeks in the area flowed inland, and followed them expecting to find a large fresh water lake...

 in 1898, who named the river after Charles and William Adcock of Derby

Derby, Western Australia

Derby is a town in the Kimberley region of Western Australia. At the 2006 census, Derby had a population of 3,093. Along with Broome and Kununurra, it is one of only three towns in the Kimberley to have a population over 2,000...

: Hann explained, "Messrs Adcock Bros of Derby were very kind to me and provided exceedingly reasonable in the important matter of a supply of rations.

Fish such as Greenway's grunter, the Flathead Goby and the False spotted gudgeon

Eleotridae

Sleeper gobies are members of the Eleotridae fish family, found predominantly in the tropical Indo-Pacific. There are approximately 35 genera and 150 species. While many eleotrids pass through a planktonic stage in the sea and some spend their entire lives in the sea, as adults the majority live in...

have been found within the river system.