Did a lovely 50km cycle off road yesterday from Streatley and back. Up the ridgeway, and then south to peasemore and around. Probably 5km on roads (and that was in Streatley). As mentioned, not a lot of mountains, but short sharp tracks. Few ruts – as mentioned – but an awful lot of wide tracks, and then singletrack through the woods. Despite it being a superb autumnal day, there was – i think – 4-5 other cyclist that i saw. Few walkers of course
The on road cycling – i think – is better in the berkshire downs than the chilterns. Some of the hills can be bruter; straight up, straight down into the next valley, then up the other side again. The chilterns is a lot busier than it used, with packs from marlow/henley/etc cycling clubs. But again, you can go on the quieter roads. Get decent tyres though, these quieter roads have an awful lot of very small, very sharp flints.