The Alfsee, which is located southeast of Alfhausen a few hundred metres east of the B 68, can be accessed from this federal road and from the Neuenkirchen-Vörden junction of the A 1 motorway that passes it to the east.
•
The rest, a bay on the eastern side of the lake is in the parish of Rieste.
•
From 1976 a holiday park was built on the eastern shore within the parish of Rieste.
•
About 95% of its area belongs to the parish of Alfhausen to the west, after which the reservoir is named.