I have never really given much thought to what is in my area, and I just tend to go out and ride.
We have plenty of bridleways etc around here, although they become very chewed up by horses in winter months. There is also the old railway lines of
Forest Way,
Worth Way and
Cuckoo trail. Very dull and boring, but handy for the odd winter ride.
I guess that I am spoilt for choice.
Deers leap http://deersleap.co.uk/mountain-biking/ is about 10 miles away.
Nealh, Deers leap probably wouldn't be worth while visiting. I occasionally pop into the shop and café, but the land is really set up for children and familes. It is pretty much just riding around the parimeter of fields.
Porc http://www.porc.uk.com/ is about 8 miles away, but is another place that I haven't bothered going to.
Bedgebury http://www.bedgeburypark.com/bedgebury-equestrian/holidays/mountain-bikes/ is about 16 miles away, and proves a very popular place. Again I haven't been there as I don't have the interest.
Bewl Water https://www.bewlwater.co.uk/activities/cycling/ is about 10 miles away. Yet another that I haven't been to.
Friston Forest is about 18 miles away.
http://www.sxmtbstmaps.co.uk/maps.html Absolutely superb riding of all kinds to be had here.
Stanmer Park. is about 23 miles away
http://www.trailforks.com/region/stanmer-park/ Another brilliant place that I know very little about.
Abbots Wood/Arlington reservoir About 18 miles away.
http://www.forestry.gov.uk/forestry/infd-8zjjv5 Another that I haven't tried.
North Downs https://en.wikipedia.org/wiki/North_Downs is about 15 miles or so away. Like Nealh, I don't venture there very much, as the views are generally not that great, and there are too many roads.
South Downs https://www.southdowns.gov.uk/ is about 18 miles away, and I can't get enough of the place.
Surrey hills is sadly about 40 miles away
http://www.surreyhills.org/ Another superb place, but you really do need local knowledge to make the most of it.
Tilgate forest is about 18 miles away.
http://www.moredirt.com/trail/United-Kingdom_South-East--London/Tilgate-Forest/361 Another that I haven't been to
Harrisons Rocks is about 3 miles away.
https://en.wikipedia.org/wiki/Harrison's_Rocks No idea how many acres are there, but we use the site for winter night rides, as it is free draining and mud free.
Broadwater forest is about 3 miles away.
http://www.highweald.org/explore-sussex/nature-reserves/broadwater-warren-tunbridge-wells.html Another free draining site which is popular with some locals for night rides.
Limekiln Forest and Park Wood. No link, but is about ten minutes cycle away, and is 44 acres of forest riding fun.
The bull track.
https://www.southeast.bike/trails/sussex/bull-track is about 2 miles away and belongs to a good friend. I occasionally go there for a bit of fun, but it isn't really my type of riding.
Ashdown Forest.
http://www.ashdownforest.org/home/index.php about a one minute ride down the road. Of course like every other mtb rider in the area, I would ever dream of riding on there!!!
Then I have the 500 acres of private woodland to ride on, which I can get to in about two minutes, and shown in yellow below. I am also trying to seek permission to ride in the ajoining 500 acres shown in red. That one has the downside of having a couple of public footpaths running through it. It is still a popular place for those with local knowledge.
Then of course there is the secret woodland, which is about ten minutes cycle away.
Sorry for showing it again.