Werdersee

Only 15 minutes. walk from Roland and you are between Weser and Kleiner Weser in the countryside. Here you can cycle, jog or skate inline - once around the Werdersee should already be in there.
Otherwise, just in the summer half of Bremen meets for swimming and barbecues on Werdersee - the other half is likely to be found on the Unisee.
You can cook to your heart's content on three well-equipped barbecue areas and on the sunbathing lawn. Otherwise, but also attracts the close "Café Sand" with drinks and food.
(Source: bremen-tourismus.de/stadttwerder)

Lots of space to relax and do sports. Great ways for running, cycling and skating. In the meadows there is enough space to play frisbee or kick. The Werdersee itself is perfect for water sports, as there are no motorized ships on the way.

A quiet spot in the middle of the city, when runners and cyclists aren't out and about in abundance