The Hullern reservoir is very beautiful, as it is usually not as crowded as the Haltern reservoir. If you want, you can take both lakes with you. A great tour. I love to drive them again and again.
The best time to visit is of course usually August when the heather is in full bloom. But all other seasons are also beautiful in this unique landscape.
During the week you hike here relatively alone, on the weekend there is a lot going on when the weather is nice. No wonder, you feel like you're on vacation here