Lyons River

{{Short description|River in Western Australia}}

{{Use dmy dates|date=March 2015}}

{{Use Australian English|date=March 2015}}

{{Infobox river

| name = Lyons

| name_other = Malgaru: Mithering

| name_etymology = Admiral Sir Edmund Lyons

| image = File:Lyons River at Ullawarra Road crossing, July 2020 05.jpg

| image_size = 280

| image_caption = The Lyons River at Ullawarra Road crossing

| map = {{Infobox mapframe |wikidata=yes |zoom=7 |frame-height=300 | stroke-width=2 |coord={{WikidataCoord|display=i}}|point = none|stroke-color=#0000FF |id=Q1645317 }}

| map_size =

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| pushpin_map =

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| subdivision_type1 = Country

| subdivision_name1 = Australia

| subdivision_type2 = State

| subdivision_name2 = Western Australia

| subdivision_type3 = Region

| subdivision_name3 = Gascoyne

| subdivision_type4 =

| subdivision_name4 =

| subdivision_type5 =

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| length = {{convert|561|km|mi|abbr=on}}

| width_min =

| width_avg =

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| depth_min =

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| discharge1_location= mouth

| discharge1_min =

| discharge1_avg = {{convert|460600|m3/s|cuft/s|abbr=on}}

| discharge1_max =

| source1 = Teano Range

| source1_location = below Staten Hill

| source1_coordinates= {{coord|24|26|42|S|117|35|55|E|display=inline}}

| source1_elevation = {{convert|535|m|abbr=on}}

| mouth = confluence with the Gascoyne River

| mouth_location = Jimba Jimba

| mouth_coordinates = {{coord|25|2|31|S|115|4|37|E|display=inline,title}}

| mouth_elevation = {{convert|137|m|abbr=on}}

| progression =

| river_system = Gascoyne River catchment

| basin_size =

| tributaries_left = Calbrajacka Creek, Onslow Creek, Edmund River, Frederick River

| tributaries_right = Koorabooka Creek

| custom_label = National park

| custom_data = Kennedy Range National Park

| extra = {{LandInfo WA|r|E|8 January 2009}}{{cite web|url=http://maps.bonzle.com/c/a?a=p&p=212395&cmd=sp |title=Map of Lyons River, WA |work=Bonzle Digital Atlas |year=2008 |access-date=23 September 2015 }}{{cite web|url=http://kumina.water.wa.gov.au/waterinformation/telem/704196/han.htm|title=River Monitoring Stations - Lyons River|work=Department of Water|publisher=Government of Western Australia|year=2008|access-date=8 February 2009|url-status=dead|archive-url=https://web.archive.org/web/20080723102335/http://kumina.water.wa.gov.au/waterinformation/telem/704196/han.htm|archive-date=23 July 2008|df=dmy-all}}

}}

The Lyons River is a river in the Gascoyne region of Western Australia.

The headwaters of the Lyons rise just west of the Teano Range and the river flows generally south-west, joined by 36 tributaries including the Edmund River, Frederick River, Onslow Creek, Gifford Creek, Koorabooka Creek and Ulura Creek. The Lyons reaches its confluence with the Gascoyne River near the township of Gascoyne Junction near the southern end of the Kennedy Range. The river descends {{convert|398|m}} over its {{convert|561|km|adj=on}} course.

Several permanent pools of water exist along the river including Cattle Pool, Windarrie Pool and Bubbawonnara Pool.

The Lyons River is known as Mithering by the local Aboriginal Australians, the Malgaru. The first European to come upon the river was explorer Francis Gregory in 1858.{{cite web|url=http://www.dec.wa.gov.au/component/option,com_hotproperty/task,view/id,57/Itemid,755/ |work=Department of Environment and Conservation |title=Parkfinder - Kennedy Range National Park |publisher=Government of Western Australia |year=2008|access-date=15 October 2010}} He named the river after the naval hero Admiral Sir Edmund Lyons.