Mapping Mountains - Hill Reclassifications - The Fours - The 400m Hills of England

 

The Fours – The 400m Hills of England - Hill Reclassifications

The Fours - The 400m Hills of England are the English hills at and above 400m and below 500m in height that have 30m minimum drop.  Accompanying the main list are three sub lists; these are the 400m Sub-Fours, 390m Sub-Fours and 390m Double Sub-Fours.  With their criteria detailed in the Change Registers which are linked in the above titles.

The list is co-authored by Myrddyn Phillips and Aled Williams and the posts that have appeared on Mapping Mountains detailing the additions, reclassifications and deletions to the main P30 list and the sub lists appear below presented chronologically in receding order.

Postscript:  On the 10^th July 2024 the final group of hills in the updated version of this list were published on the Mapping Mountains site.  It was also announced that the sub hills accompanying the main listing of The Fours – The 400m Hills of England now take in just one category, this category is entitled the Sub-Fours. 

Therefore, the 390m Sub-Fours and 390m Double Sub-Fours have been dispensed with and the criteria for the 400m Sub-Fours that included English hills at and above 400m and below 500m in height that have 20m and more and below 30m of drop, have been amended to include English hills at and above 400m and below 500m in height that have 15m and more and below 30m of drop and their title changed to the Sub-Fours.

Mapping Mountains - Hill Reclassifications - The Fours - The 400m Hills of England

Pt. 449.7m (NY 276 176) – Sub-Four addition (74th reclassification)

There has been an addition to the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pt. 449.7m (NY 276 176)

The criteria for the list that this addition applies to are:

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is listed by the point (Pt. 449.7m) notation, and it is adjoined to the High Raise group of hills, which are situated in the English Lake District, and it is positioned with the A591 road to its north-east and a minor road and the B5289 road to its west, and has the small community of Rosthwaite towards the south south-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed with an estimated c 14m of drop, based on an estimated c 450m summit height and an estimated c 436m col height, with both heights based on interpolation of 10m contouring that appears on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Sub-Four status is due to LIDAR analysis, resulting in a 449.7m summit height and a 434.5m col height, with these values giving this hill 15.2m of drop, which is sufficient for it to be classified as a Sub-Four.

 

The full details for the hill are:

Group:  High Raise

Name:  Pt. 449.7m

OS 1:50,000 map:  89, 90

Summit Height:  449.7m (LIDAR)

Summit Grid Reference:  NY 27681 17605 (LIDAR)

Col Height:  434.5m (LIDAR)

Col Grid Reference:  NY 27802 17564 (LIDAR)

Drop:  15.2m (LIDAR)

 

For the additions, deletions and reclassifications to The Fours – The 400m Hills of England reported on Mapping Mountains since the December 2013 publication of the 1^st edition of this list by Europeaklist please consult the following Change Registers:

 

The Fours

 

Sub-Fours

 

Myrddyn Phillips and Aled Williams (December 2024)

Mapping Mountains - Hill Reclassifications - The Fours - The 400m Hills of England

High Pen (NY 109 188) – Sub-Four exclusion (73rd reclassification)

There has been an exclusion to the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of High Pen (NY 109 188)

The criteria for the list that this exclusion applies to are:

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Docformat from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The name the hill is listed by is High Pen, and it is adjoined to the High Stile group of hills, which are situated in the English Lake District, and it is positioned with a minor road to its north, the A5086 road to its west and the B5289 road to its east, and has the hamlet of Ennerdale Bridge towards the south-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed with an estimated c 17m of drop, based on the 475m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 458m col height, based on interpolation of 10m contouring between 450m – 460m. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the exclusion of this hill from Sub-Four status is due to LIDAR analysis, resulting in a 473.9m summit height and a 459.0m col height, with these values giving this hill 14.9m of drop, which is insufficient for it to be classified as a Sub-Four.

 

The full details for the hill are:

Group:  High Stile

Name:  High Pen

OS 1:50,000 map:  89

Summit Height:  473.9m (LIDAR)

Summit Grid Reference:  NY 10997 18896 (LIDAR)

Col Height:  459.0m (LIDAR)

Col Grid Reference:  NY 11170 18952 (LIDAR)

Drop:  14.9m (LIDAR)

 

For the additions, deletions and reclassifications to The Fours – The 400m Hills of England reported on Mapping Mountains since the December 2013 publication of the 1^st edition of this list by Europeaklist please consult the following Change Registers:

 

The Fours

 

Sub-Fours

 

Myrddyn Phillips and Aled Williams (December 2024)

Mapping Mountains - Hill Reclassifications - The Fours - The 400m Hills of England

Kirk Fell (NY 172 265) – Sub-Four exclusion (72nd reclassification)

There has been an exclusion to the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Kirk Fell (NY 172 265)

The criteria for the list that this exclusion applies to are:

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Kirk Fell, and it is adjoined to the Grasmoor group of hills, which are situated in the English Lake District, and it is positioned with a minor road to its north-west, the B5292 road to its south and the A66 road to its east, and has the town of Cockermouth towards the north-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed with 15m of drop, based on the 438m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and the 423m col spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the exclusion of this hill from Sub-Four status is due to LIDAR analysis, resulting in a 437.4m summit height and a 422.6m col height, with these values giving this hill 14.8m of drop, which is insufficient for it to be classified as a Sub-Four.

 

The full details for the hill are:

Group:  Grasmoor

Name:  Kirk Fell

OS 1:50,000 map:  89, 90

Summit Height:  437.4m (LIDAR)

Summit Grid Reference:  NY 17283 26562 (LIDAR)

Col Height:  422.6m (LIDAR)

Col Grid Reference:  NY 17404 26612 (LIDAR)

Drop:  14.8m (LIDAR)

 

For the additions, deletions and reclassifications to The Fours – The 400m Hills of England reported on Mapping Mountains since the December 2013 publication of the 1^st edition of this list by Europeaklist please consult the following Change Registers:

 

The Fours

 

Sub-Fours

 

Myrddyn Phillips and Aled Williams (December 2024)

Mapping Mountains - Hill Reclassifications - The Fours - The 400m Hills of England

Buck Fell (NY 594 906) – Sub-Four addition (71st reclassification)

There has been an addition to the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Buck Fell (NY 594 906)

The criteria for the list that this addition applies to are:

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Buck Fell, and it is adjoined to the Sighty Crag group of hills, which are situated in the north-east of the country close to the border with Scotland, and it is positioned with the B6357 road to its west and a minor road t0 its east, and has the village of Butteryhaugh towards the north-east.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed with 14m of drop, based on the 402m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 388m col spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Sub-Four status is due to LIDAR analysis, resulting in a 401.7m summit height and a 386.5m col height, with these values giving this hill 15.3m of drop, which is sufficient for it to be classified as a Sub-Four.

 

The full details for the hill are:

Group:  Sighty Crag

Name:  Buck Fell

OS 1:50,000 map:  80

Summit Height:  401.7m (LIDAR)

Summit Grid Reference:  NY 59457 90613 (LIDAR)

Col Height:  386.5m (LIDAR)

Col Grid Reference:  NY 59296 90959 (LIDAR)

Drop:  15.3m (LIDAR)

 

For the additions, deletions and reclassifications to The Fours – The 400m Hills of England reported on Mapping Mountains since the December 2013 publication of the 1^st edition of this list by Europeaklist please consult the following Change Registers:

 

The Fours

 

Sub-Fours

 

Myrddyn Phillips and Aled Williams (November 2024)