Greenwich Meridian Trail
396 km (246 miles) from Peacehaven, East Sussex to Sand le Mere, East Yorkshire, in England, through 1 national park.
- Distance
- 396.1 km
- In miles
- 246.1 mi
- Day stages
- 20 at ~20 km
- Typical trip
- 15–20 days
- Countries
- England
- National parks
- 1
- Listed summits within 2.5 km
- 0
- Waymark
- GMT
- Managed by
- Graham & Hilda Heap
About the route
A long-distance walk that follows the line of the Prime Meridian. Inaugurated in 2009, to coincide with the 125th anniversary of the Greenwich Meridian.
Route description as recorded in OpenStreetMap by its contributors (ODbL).
How long it really is
We measure Greenwich Meridian Trail at 396.1 km (246.1 miles), computed by walking the OpenStreetMap route geometry point by point. The route is tagged in OpenStreetMap as 440; where that differs from our figure, the difference is usually alternative sections, spurs, or a published distance that rounds.
This is horizontal distance only. Our trail dataset carries no elevation profile, so we will not quote a total climb or a confident walking time — on hill routes ascent can add hours a day. A flat-ground pace gives roughly 95 h 18 min of walking for the whole route, which is a floor, not an estimate. Add your own ascent figure in the walking-time calculator for something usable.
Access rights along the way
The route stays within England, so one access regime applies along its length.
England
Conditional Right to roam: Right to roam only on mapped CRoW open access land.
Conditional Wild camping: Permission needed — except on the Dartmoor commons.
A waymarked route is a route you may walk — it does not follow that you may camp beside it, leave it, or take a dog on it. Long-distance paths cross farmland, estates and access land in turn, and byelaws and seasonal restrictions override the general position. This is general information, not legal advice. Check a specific spot with the access checker.
National parks on the route
The line passes through one national park, each with its own byelaws and camping position.
The route in day stages
Greenwich Meridian Trail cut into 20 stages of roughly 20 km, measured along the line itself. These are equal-distance splits computed from the geometry, not an official itinerary — they will not always land on a village, a bunkhouse or a station, and the real day you walk should be set by where you can sleep.
OpenStreetMap does not hold Greenwich Meridian Trail as one continuous line, so the stages below run through the pieces in order of length and the joins between them are not walking distance. Treat the stage boundaries as approximate, and check the official route for the sections between them.
| Stage | Distance | Cumulative | Starts near | Ends near | Flat-ground time |
|---|---|---|---|---|---|
| 1 | 20.1 km | 20.1 km | TL 3674 7440 | TL 3767 5959 | 4 h 25 min |
| 2 | 20.1 km | 40.2 km | TL 3767 5959 | TL 3759 4489 | 4 h 25 min |
| 3 | 20 km | 60.2 km | TL 3759 4489 | TL 3731 2995 | 4 h 24 min |
| 4 | 20.1 km | 80.4 km | TL 3731 2995 | TL 3823 1565 | 4 h 25 min |
| 5 | 20.2 km | 100.5 km | TL 3823 1565 | TL 3844 0055 | 4 h 27 min |
| 6 | 20.2 km | 120.7 km | TL 3844 0055 | TQ 4014 8663 | 4 h 27 min |
| 7 | 20.2 km | 140.9 km | TQ 4014 8663 | TQ 3716 7238 | 4 h 27 min |
| 8 | 20.1 km | 161 km | TQ 3716 7238 | TQ 3916 5961 | 4 h 25 min |
| 9 | 20 km | 181.1 km | TQ 3916 5961 | TQ 3904 4446 | 4 h 24 min |
| 10 | 20.1 km | 201.2 km | TQ 3904 4446 | TQ 3967 2840 | 4 h 25 min |
| 11 | 20.2 km | 221.3 km | TQ 3967 2840 | TQ 4174 1354 | 4 h 27 min |
| 12 | 20.2 km | 241.6 km | TQ 4174 1354 | TF 3627 2437 | 4 h 27 min |
| 13 | 20.3 km | 261.9 km | TF 3627 2437 | TF 3701 0847 | 4 h 28 min |
| 14 | 20.2 km | 282.1 km | TF 3701 0847 | TF 3373 9618 | 4 h 27 min |
| 15 | 20.4 km | 302.5 km | TF 3373 9618 | TA 3374 2321 | 4 h 29 min |
| 16 | 20.3 km | 322.8 km | TA 3374 2321 | TF 3226 7862 | 4 h 28 min |
| 17 | 20.4 km | 343.1 km | TF 3226 7862 | TF 3470 6344 | 4 h 29 min |
| 18 | 20.1 km | 363.3 km | TF 3470 6344 | TL 4192 9073 | 4 h 25 min |
| 19 | 20.2 km | 383.5 km | TL 4192 9073 | TF 3329 7378 | 4 h 27 min |
| 20 | 3.6 km | 387 km | TF 3329 7378 | TF 3436 6909 | 48 min |
Positions are 8-figure (100 m) OS grid references for points on the line, computed from WGS84 coordinates. Flat-ground times are Naismith at 5 km/h with a 6 min/hour rest allowance and no ascent — add the climb in the walking-time calculator before you plan around them.
Conditions on the route
Weather at the route midpoint live
Loading forecast for the midpoint of the route…
Forecast for the midpoint of the Greenwich Meridian Trail, at MET Norway's own ground level — we hold no elevation profile for this route, so nothing here is altitude-adjusted, and conditions vary considerably end to end on a route this long. Weather data from MET Norway (CC BY 4.0).
Daylight at the midpoint today
- Sunrise
- —
- Sunset
- —
- Daylight
- —
- Civil twilight ends
- —
Computed astronomically for 51.531, -0.004. Set a turnaround with the daylight safety planner.
Plan this walk
- Walking-time calculator — add ascent, terrain, pack weight and fitness to get a usable time.
- Pack-weight calculator — multi-day routes live or die on base weight.
- Kit-list generator — season and terrain aware.
- Access checker — what a specific grid reference on the route allows.
- Best month to walk — historical rainfall, temperature and wind by area.
- Safety notes — conditions change fast; build in margin.
Other long-distance paths nearby
Sources for this route
- Route geometry, name, waymark and operator: OpenStreetMap relation 3212473 — © OpenStreetMap contributors, ODbL.
- Distance, stages, country crossings, park crossings and summit proximity: computed by OpenFell from that geometry.
- Boundaries: Office for National Statistics (OGL v3.0). Summits: Database of British & Irish Hills v18.3 (CC BY 4.0).
- Official route website: www.greenwichmeridiantrail.co.uk
OpenStreetMap data is licensed under the Open Database Licence. Our derived trail measurements are published under the same terms — see data sources.