Skiddaw is a mountain in the Lake District National Park in England. Its 931-metre summit is the sixth-highest in England. It lies just north of the town of Keswick, Cumbria, and dominates the skyline in this part of the northern lakes. It is the simplest of the Lake District mountains of this height to ascend and, as such, many walking guides recommend it to the occasional walker wishing to climb a mountain. This is the first summit of the fell running challenge known as the Bob Graham Round when undertaken in a clockwise direction.
The mountain lends its name to the surrounding areas of ‘Skiddaw Forest’, and ‘Back o' Skidda' ’ and to the isolated ‘Skiddaw House’, situated to the east, formerly a shooting lodge and subsequently a youth hostel. It also provides the name for the slate derived from that region: Skiddaw slate. Tuned percussion musical instruments or lithophones exist which are made from the slate, such as the Musical Stones of Skiddaw held at the Keswick Museum and Art Gallery.