Map & Elevation
About this Route
This GPX follows the radar access road from Knock to the summit of Great Dun Fell and returns the same way. It covers 15.1 km with about 670 m of ascent. Allow 4 to 6 hours on foot. The surface is mostly tarmac, but the length, relentless gradient and severe Pennine weather still make it a substantial outing.
Start above Knock at the end of the public road and continue past the private-road signs on foot. The lane climbs steadily through open fell, passing old mine workings and gaining broad views across the Eden Valley. It is a working service road, so authorised vehicles may appear without much warning. Higher up, the road crosses increasingly exposed ground before the huge radar dome comes into view. Continue to the summit area at 848 m, staying outside all fenced compounds and obeying operational signs.
Return down the same road. Public motor traffic is not permitted beyond the signed limit, even though walkers, cyclists and horse riders may use most of the route. Do not try to drive higher or park at gates. The road is easy to follow, but fog, ice and the Helm Wind can make the upper miles serious; there is almost no shelter, and tarmac is hard on feet and knees. Carry hill clothing, water and navigation, and be ready for service vehicles or temporary work restrictions.
The private road to the radar station is the highest surfaced road in Britain.
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Route Waypoints
Start above Knock where the public road ends. Park only in a permitted place and keep the private access road and gates clear.
Continue on foot along the radar road. The restriction applies to unauthorised motor vehicles, not walkers using the route responsibly.
Climb the quiet tarmac lane through open pasture. Keep to one side and listen for authorised vehicles.
Pass evidence of former mining beside the road. Stay on the tarmac and do not enter shafts, spoil or fenced ground.
The road steepens through bends as views open across the Eden Valley. Wind becomes more noticeable with height.
Continue over exposed fell towards the radar dome. In fog or snow, track your position despite the obvious road.
Reach the radar compound at 848 m. Respect fences and signs, and do not interfere with operational equipment.
Retrace the full access road to the public-road limit. Descend steadily to reduce strain from the long tarmac surface.
Essential Tips
The radar road is not open to public motor traffic. Walk from the signed public limit and never obstruct operational access.
NATS staff and contractors may use the narrow road. Keep to the side at bends and supervise children and dogs.
The upper fell is exposed to fog, ice and the Helm Wind. Carry full hill clothing even though the route is surfaced.
Fifteen kilometres of tarmac can be punishing. Supportive footwear, poles and a measured descent pace may help.
Frequently Asked Questions
How long does it take to walk up Great Dun Fell?
Allow 4 to 6 hours for the full round trip. The route covers 15.3 km with 629 m of ascent, so it's a substantial day out despite being on tarmac.
Is the Great Dun Fell walk suitable for beginners?
Not really. It's graded strenuous due to the relentless gradient, severe Pennine weather, and exposed conditions at altitude. You'll need full hill clothing, navigation skills, and stamina for 15 km on tarmac.
Will I see vehicles on the Great Dun Fell road?
Yes, authorised NATS staff and contractors use the narrow service road, often without much warning. Keep to one side, especially around bends, and supervise children and dogs carefully.