Calf Top

Calf Top is a mountain in the western part of the Yorkshire Dales, England. It is located in the county of Cumbria, although Lancashire and North Yorkshire are not far away. The hill is a dominating profile in the view from many of the smaller hills to its west, such as Lambrigg Fell and Hutton Roof Crags.

Calf Top
Calf Top Yorkshire Dales, England
Highest point
Elevation	610 m (2000 ft)
Prominence	312 m[1]
Parent peak	Whernside
Listing	Marilyn, Dewey
Coordinates	54°15′55″N 2°31′00″W
Geography
Location	Yorkshire Dales, England
OS grid	SD 66449 85624
Topo map	OS Landranger 98

The height was formerly shown on Ordnance Survey maps as 609 metres. The closeness of this figure to the threshold of 2,000 feet (609.6 m) used in the United Kingdom to separate mountains and hills led to the summit being surveyed using precision GPS and levelling equipment.[2][3] The height was found to be 609.58 ± 0.1m, or fractionally below 2,000 feet. The result was discussed with the authors of the Nuttalls, Hewitts and Deweys who all agreed that the hill should retain its current status as a member of Dewey's list of hills at least 500 metres but less than 609.6 metres high.[4] Current OS maps show the height rounded to 610 metres. The Ordnance Survey recalculated the height of the mountain in 2016 using the OSTN15/OSGM15 transformation to a height of 609.606 metres updating the status from hill to mountain.[5]

Calf Top is separated from its neighbours, Great Coum and Aye Gill Pike by the deep trench of Barbondale, meaning that although it is lower than most of the hills in its region, it has high relative height and is a Marilyn.

References

1. Database of British and Irish Hills v13.2. Retrieved 28 August 2013.
2. First survey of Calf Top
3. Second survey of Calf Top
4. Is Calf Top a new 2000ft mountain?
5. "Calf Top – England's last mountain - Ordnance Survey Blog". Ordnance Survey. 2016-09-08. Retrieved 2016-09-13.