Arkengarthdale is a dale, or valley, on the east side of the Pennines in North Yorkshire, England. Running roughly north-west to south-east, it is the valley of the Arkle Beck, and is the northernmost of the Yorkshire Dales. It is a subsidiary dale to Swaledale, which it joins at Reeth.
On its way up the dale from Reeth the unclassified road crosses many other small streams and their catchments, such as Great Punchard Gill, Roe Beck, Annaside Beck, and William Gill. It passes through several small settlements: Raw, Arkle Town, Langthwaite .