For a while, some routes were being posted in this thread so there are some more to look at there, but that thread also hasn't been used for quite some time.
Someone started a Lea Valley group on ridewithgps a couple of years ago or so and there are more routes there. There are also various routes which were made on Strava, which obviously won't be in the ridewithgps group, and lots of routes which were only posted to Facebook. It will take quite a while to get them all together (and to edit any which don't go via High Beach), but ultimately it should be possible to have a page on the website with lots of routes on.
@JamieF
For a while, some routes were being posted in this thread so there are some more to look at there, but that thread also hasn't been used for quite some time.
Someone started a Lea Valley group on ridewithgps a couple of years ago or so and there are more routes there. There are also various routes which were made on Strava, which obviously won't be in the ridewithgps group, and lots of routes which were only posted to Facebook. It will take quite a while to get them all together (and to edit any which don't go via High Beach), but ultimately it should be possible to have a page on the website with lots of routes on.