Yes, I live in Madrid and therefore from time to time I will show you some tours around the spanish capital, tested by myself a lot of times and well known as very recommended biker routes.
This tour takes us the the east, with very pretty roads near Torrelaguna with a possible extension to the Atazar water reservoir, the biggest of this region and very interesting to have a look at. This extension has a a lot of good bends you will surely enjoy.
The complete googlemaps link.