Welcome along Kazevac....glad you can do your ride off road - makes it pleasant !
For getting really fit, the road is the only place as you can't really blast down tracks as it's irresponsible, but sure makes a good way of getting into the swing of things.
I've just noticed, it might be possible for me to get from home to work with only about a mile on the roads - the Trans Pennine runs close to work and home, although never used it - might be good in summer for a change of scene and pace !