I live in the West of England and there is a website for people with sight loss, from any condition, called Sight Support West of England,
Looking at the website recently I noted they've partnered up with the Ramblers Association which will pair up a blind or partially sighted person with a sighted guide, so you can join them in a ramble without fear of falling while walking on strange ground
Just thought I'd pass this on in case anyone's interested or maybe see if there's a similar scheme in your area