Add Kentmere, Tilberthwaite,Loughrigg and Hodge Close to the lists above
If you are coming up from the South it is worth stopping in at Wheelbase in Staveley. They have just got a whole load of new stock in. Treat the GF to a meal in Wilfs Cafe next door, pick some beer up at the brewery and bread/chees at the bakery 😆
Then up to Ambleside and a visit to Biketreks.
Just up the road is Keswick and Keswick Mountainbikes and their cafe the Lakeland Pedlar. The “must do classic” ride form Keswick is the Borrowdale Bash and/or a route around Skiddaw.
Suggest calling any of the above shops and getting the printed routes posted to you before travelling and then copy them onto the appropriate OS map. They are up to a couple of ££s I noticed the other day but still worth it if you cannot find other info.
http://www.mountain-bike-cumbria.co.uk/