Glendale, Northumberland of places both in this area, and Longsleddale near Kendal, Cumbria, where he also lived. Glendale, Northumberland Glendale is the name of a valley in North Northumberland that runs from the Cheviot Hills at Kirknewton onto the Milfield Plain, formed by the River Glen. However, the name is generally taken to indicate the area around the town of Wooler. Glendale gave rise to the fictional "Greendale", the area in which the Postman Pat stories are set. Author John Cunliffe adapted the name in his series of children's books after working in the area as a mobile library driver for many
Northumberland Sandstone Hills flushes, mires, loughs and small reservoirs are dotted throughout the area. Fifteen percent of the NCA lies within the Northumberland National Park and it also contains one Special Protection Area - Holburn Lake & Moss - and 3 Special Areas of Conservation - Simonside Hills; Harbottle Moors; and River Tweed - as well as 18 Sites of Special Scientific Interest, the latter totalling 3,771 hectares. Its major watercourses are the rivers Aln, Till, Coquet, Fallowlees Burn, Font and Rede. Smaller hill ranges within the Northumberland Sandstone Hills include the Simonside Hills and Harbottle Hills in the south, and Alnwick Moor,