Lake MacDonald is Noosa's water supply, and because of this, only non powered Boats are allowed on the water. We saw lots of Canoeist's, I imagine it would be quite good fun exploring this big lake.
If you read the Notice board by the Boat Ramp, you will see that there is a "Paddle Trail" to follow on the Lake.
Walking along the edge, I saw a beautiful Azure Blue Kingfisher, plus Cormorant's, Heron's, Mountain & Wood Ducks and Water Fowl.
As we drove along the Cooroy - Tewantin Road, we saw this lake often. If you want to Bird Watch, then look for the sign-posted "Bird Hide." There is off road parking, and a short walk to it.
This website will tell you about ALL the Bird Watching Trails in the Noosa Area.
There a nice picnic areas alongside it, and also Boat ramps.
The beautiful Noosa Botanic Garden's come down to the edge of Lake MacDonald.