Milton Keynes is often described as one of the greenest cities in England. It’s a claim that surprises people who’ve only seen it from the M1, but it’s verifiable from the air — the city’s mature tree canopy is extraordinary for an urban area, and especially for one built almost entirely from scratch in the late 20th century.
The reason is simple: the people who designed MK decided from the very beginning that trees were not optional.
The Original Decision
When the Milton Keynes Development Corporation drew up its masterplan in the late 1960s, green space was written into the design at a structural level. Twenty-five percent of the city’s total area was designated as parks, green corridors, and open space. This wasn’t a concession or an afterthought — it was a fundamental design principle.
Alongside this, the MKDC made a commitment to plant trees everywhere. Not just in parks and gardens. Along every grid road. Between every housing estate and the roads serving it. Around every commercial development. In the spaces between things.
The intention was that as the city matured, the tree canopy would transform it — that what began as a raw, exposed new town would gradually become something that looked as much like a forest as an urban area.
They were right.
22 Million Trees
Over the five decades since construction began, more than 22 million trees have been planted across the MK borough. The species range from native broadleaves — oak, ash, hornbeam, cherry — to ornamental and street trees selected for their resilience and seasonal colour.
The result, visible from aerial photography, is remarkable. The grid roads run through tunnels of mature trees. The parks merge with the woodland corridors between them. Ancient woodland like Howe Park Wood sits alongside the housing estates that surround it, connected by greenways that make the boundary between urban and natural genuinely difficult to find.
Where to Experience MK’s Green Side
Howe Park Wood — ancient broadleaf woodland in South MK, designated as a Local Nature Reserve. Bluebells in late April. Free to enter.
Campbell Park — 250 acres of managed parkland with wildflower meadows, woodland walks, and the finest views over the city. Full guide →
Willen Lake — 180 acres of lakeside parkland with mature trees along both the North and South lake walking loops. Full guide →
The Redways — 150 miles of cycling and walking paths, most of them running through green corridors between and alongside the tree-lined grid roads.
Ouzel Valley Park — a linear riverside park along the River Ouzel, winding through the heart of MK with waterside trees, wildlife and genuine tranquillity.
Linford Wood — one of MK’s ancient woodland sites in North MK. Free to enter, rich in wildlife, and completely unknown to most residents.
💡Top Tip: The best time to see MK’s trees is either late April (to see the stunning bluebells in the ancient woodlands) or October (for incredible autumn colours across the grid roads and parks). Both experiences are genuinely beautiful and completely free!