Arkle Beck is the stream running through the valley of Arkengarthdale in the Yorkshire Dales, England. It is a tributary of the River Swale, which it joins just past Reeth at Grinton Bridge. The beck itself has several tributaries which include:Ordnance Survey 1:12000 mapping, 2023 Great Punchard Gill joins the beck just north of Whaw William Gill drains a substantial area of West Moor into Beck Crooks, which is the first tributary after Arkle Beck's source Annaside Beck joins just below Beck Crooks Roe Beck joins at Shepherd's Lodge just above Great Punchard Gill
In 1986, a section of the meadow alongside Arkle Beck at Whaw was designated as a site of special scientific interest (SSSI).
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