On the flat: Perhaps it’s been a while since you were on a bike, or want something a bit more leasurly. Well this is a great place to start. There are 7km of flat cycle paths along the (beach) front on the promenade.
Behind the beach are hills, and the roads in this area, which are quiet, are used as a training ground for road cycle teams.
I understand that mountain biking is also popular in the region – although being off-road, you don’t see many around!