River Sett

{{Short description|River in Derbyshire, England}}

{{Use dmy dates|date=April 2022}}

{{Infobox river

| name = River Sett

| image = River_Sett_157385_73847fc6.jpg

| image_caption = The Sett passes under the A624 Hayfield "bypass". The tower of St. Matthew's church can be seen through the trees in the background, and in the foreground are the scanty remains of Walk Mill.

| map = River Sett map.png

| map_caption = The River Sett is highlighted in red
Coordinates: {{coord|53.36440|-1.99990}}

| source1_location = Kinder Scout

| mouth_location = River Goyt

| subdivision_type1 = Country

| subdivision_name1 = England

| length = {{Convert|16.876|km}}

| source1_elevation = c.{{Convert|540|m|ft}}{{citation | date=2009-02-02 | title=The Peak District: Dark Park Area (OS Explorer Map)|publisher = Ordnance Survey|place=Southampton|volume=OL1|isbn= 978-0-319-24067-0}}

| mouth_elevation = c.{{Convert|130|m|ft}}

| discharge1_avg =

| basin_size = {{Convert|47.143|km2}}

| tributaries_right = River Kinder

}}

File:Source of the River Sett.jpg

The River Sett is a river that flows through the High Peak borough of Derbyshire, in north western England. It rises near Edale Cross on Kinder Scout and flows through the villages of Hayfield and Birch Vale to join the River Goyt at New Mills. The River Goyt is one of the principal tributaries of the River Mersey. In the past, the river was known as the River Kinder; the modern River Kinder is a right tributary of the Sett, joining the river at Bowden Bridge above Hayfield.{{cite web |url=http://www.british-history.ac.uk/topographical-dict/england/pp394-398#h3-0022 |title=A Topographical Dictionary of England |editor-first=Samuel |editor-last=Lewis |date=1848 |pages=394–398 |quote=The Kinder derives its source from the mountain of Kinder-Scout, and, separating the county of Derby from that of Chester, falls into the river Guyt at a place called the Tor.|access-date=18 April 2018}}

The 2.5-mile Sett Valley Trail follows the trackbed of the former railway line along the valley between Hayfield and New Mills.Sett Valley Trail (leaflet produced by Derbyshire County Council Environmental Services Department)

The river's Environment Agency pollution classification changed from good to moderate in 2014.{{Cite web|url=https://environment.data.gov.uk/catchment-planning/WaterBody/GB112069060970|title=Catchment Data Explorer|website=environment.data.gov.uk|access-date=2019-08-14}}