The route is here.
You can get a GPX file on the Ride with GPS page linked to above. On the top right of the page, choose “Export” and then choose “GPX Track”.
This is different in a few places compared with previous years. Follow the signs.
The Beacon at the end is about 1km in length, averaging 10%. It’s painful if you want to get it done fast, but you can spin up it in 10 minutes or so if you want to. At the summit, get off the road to the right, get your timing tag registered by a marshall, and enjoy the panoramic views for as long or as short as you want, before going back down the Beacon into Ditchling and back to HQ for a warm drink and some pasta.
Overall distance: 101km, 62 miles
Total ascent: 1350 metres
Apart from the Beacon, the ascents are mostly draggy climbs or short 2-3 minute hills to punch your way up – no other major climbs, although you may disagree afterwards!