Black Mountain is a mountain in the Black Mountains (not to be confused with the Black Mountain range of hills). It is the only Marilyn to fall exactly on the Welsh-English border, straddling Powys and Herefordshire. A topographical summit is a point on a surface which is higher in elevation than all points immediately adjacent to it. ... The metre, or meter (symbol: m) is the SI base unit of length. ... A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. ... The Black Mountains are a group of hills in south-eastern Wales, and a small part of Herefordshire, England. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area - Total Ranked 1st UK 130,395 km² Population - Total (mid-2004) - Density Ranked 1st UK 50. ... National motto: Cymru am byth (Welsh: Wales for ever) Waless location within the UK Official languages English, Welsh Capital Cardiff Largest city Cardiff First Minister Rhodri Morgan Area  - Total Ranked 3rd UK 20,779 km² Population  - Total (2001)  - Density Ranked 3rd UK 2,903,085 140/km² Ethnicity: 97. ... In topography, prominence, also known as autonomous height, relative height or prime factor (in Europe), is a concept used in the categorization of hills and mountains. ... Example of a topographic map with contour lines Topographic maps, also called contour maps, topo maps or topo quads (for quadrangles), are maps that show topography, or land contours, by means of contour lines. ... Image produced from the Ordnance Survey Get-a-map service. ... The British national grid reference system is a system of geographic grid references commonly used in Great Britain, different from using latitude or longitude. ... Peak bagging (also hill bagging, mountain bagging, or among enthusiasts, just bagging) is a popular activity for hillwalkers and mountaineers in which they attempt to reach the summit of each peak in a region above some height, or having a particular feature. ... A Marilyn is a hill with a relative height of at least 150 metres, regardless of absolute height or other merit. ... A Hewitt is a hill in England, Wales or Ireland over two thousand feet (609. ... Mount McKinley in Alaska has one of the largest visible base-to-summit elevation differences anywhere A mountain is a landform that extends above the surrounding terrain in a limited area. ... The Black Mountains are a group of hills in south-eastern Wales, and a small part of Herefordshire, England. ... A Marilyn is a hill with a relative height of at least 150 metres, regardless of absolute height or other merit. ... National motto: Cymru am byth (Welsh: Wales for ever) Waless location within the UK Official languages English, Welsh Capital Cardiff Largest city Cardiff First Minister Rhodri Morgan Area  - Total Ranked 3rd UK 20,779 km² Population  - Total (2001)  - Density Ranked 3rd UK 2,903,085 140/km² Ethnicity: 97. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area - Total Ranked 1st UK 130,395 km² Population - Total (mid-2004) - Density Ranked 1st UK 50. ... Powys is an administrative county in Wales, over 2000 sq. ... Herefordshire is a traditional and ceremonial county and unitary district in the West Midlands region of England in the United Kingdom. ...

Offa's Dyke long distance footpath passes along the ridge, more or less from south to north (or vice versa), while a steeper path leads to the summit from near the youth hostel in the Vale of Ewyas to the west. Offas Dyke is a massive earthwork between England and Wales, running from the estuary of the River Dee in the north to the River Wye in the south (approximately 240 km). ... Long-distance trails (or long-distance tracks, paths, footpaths or greenways) are trails or footpaths covering large distances, typically 50 km or more, used for rambling (that is, hiking or backpacking). ... Youth hostel in Rome. ...