Outerside is a fell in the Lake District in Cumbria, England. It is located 6 kilometres west of Keswick in the north western part of the national park and is a smaller member of the Coledale group of fells with a height of 568 metres. The fell is part of a ridge on the southern side of Coledale which descends from the higher fell of Scar Crags and continues over the neighbouring smaller fell of Barrow before reaching the valley at the village of Braithwaite.