The Moreton Bay Cycleway (while not fully completed) gets my vote for 'most improved'. The cycleway will eventually run from Bribie Island to Redland Bay which will be fantastic. Not quite done yet though but there are a lot of parts that are really enjoyable to ride on.
I have cycled along the section that follows Rickertt Road at Ransome and Thornside. The best past is when you cross the bridge over Tingalpa Creek, it is just beautiful. Just as you come off the bridge (if you are headed towards the city) there is a parking area really popular for fisherman of a weekend. The view of the creek is gorgeous at almost anytime of day but it does get uncomfortably hot if you go in the middle of the day. read more