There are many websites that list the mountain summits and hills of England and Wales, and
many of these give the 6 figure (100 metre) Ordnance Survey grid references of the
summits. Being the owner of a hand-held GPS receiver (a Garmin GPSMAP 60Cx), which can
record 10 figure grid references (theoretically accurate to 1 metre), I have tried to obtain
accurate grid refs for each summit. I started by making careful measurements from OS
1:25,000 maps (Outdoor Leisure and Explorer series), and subsequently revised some
of these map estimates with actual readings from my GPS receiver. But now many of the grid
references are taken from the
Database of British and Irish Hills (DoBIH), which benefits from having many people contributing their GPS readings
to the database, and many hills having several readings thus improving accuracy and reliability.
You may find the DoBIH Database Notes
useful in conjunction with this website.
I know that for many summits, such precision is unnecessary - but in mist, or when the top
could be one of several rocky outcrops, or a flat plateau with a tiny cairn, or even
completely unmarked.... (Also, I'm a bit of an anorak who's been given a new toy).
Such accuracy would, of course, have been useless before "Selective Availability" was switched
I would be grateful to anyone who could send me their recorded grid references, for submission
to the Database of British and Irish Hills to further improve its accuracy. I would
also welcome your comments and suggestions about this website - see contact
Some of the grid references have been calculated from maps, not as a result of visiting the
mountain summits. There also may be inaccuracies due to typing errors. You
should take a good map and compass with you on all walking trips into the mountains. A
GPS receiver is great fun, but a compass doesn't get flat batteries!