Nef River
{{Unreferenced|date=March 2020}}
{{Infobox river
| name = Nef River
| image =
| image_size =
| map = {{CSS image crop
| Image = Region de Aysen-Rios y Ciudades(png).png
| bSize = 400
| oLeft =100
| oTop =350
| cWidth = 300
| cHeight = 200 }}
| map_caption = Nef River in the Aysén Region
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| source1_location =
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| subdivision_type1 = Country
| subdivision_name1 = Chile
| length =
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The Nef River is a river of Chile. The river has its source at a proglacial lake, which is feed by Nef Glacier. It flows in a generally easterly direction until it discharges into the Baker River.