Friston from Crawley – blimey! What a faffle, to drive all the way there for a tiny patch of scrubby woodland, unless your after big downs riding, then there's quicker ways to get on the south downs, from Crawley.
Head to Tilgate for an explore, no tracklogs, the best woodland riding is unmappable – you should know that. Or for a full day out head to Surrey Hills and pick up one of the over exploited routes there (see the Leith Hill thread by Mr Woppit if you dare! :wink:)
Nirvana cycles will sell you a laminated map – you can park near and ride from the shop. I'm sure tracklogs for the area exist from MBR etc – just don't expect to find the best stuff.
I would show you the best riding a stones throw from Crawley, but I'll be riding on the isle of Wight this weekend.
Enjoy, and let us know where and how you found it.
Pete