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 off. 

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 details.


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!