Lowie isnt to bad really theres a fair few high walls and gaps and theres a large selection of natural to ride also.
If your looking for a few differnt spots to ride round norwich have a look at waterloo park just on the outskirts of norwich,
Sheringham has alot of natural spots there to ride, great yarmouth isnt to bad alot of tech lines but most of the stuff down there dosnt go over bar height
and lowie as explained above really.
Biddle.