I learned that there is a Watson-Willow Lake Ecosystem Important Bird Area (IBA). Yes, that is what it is called! Apparently this is a great place to do bird watching. They even have a bird blind where you can stake out and do some bird watching.
As with Watson Lake, at Willow Lake there is little shade, so wear sunscreen and a hat. The entire Willow Lake Circle path is about 5 1/2 miles long and took me about 2 hours. There is very little elevation gain but scaling the boulders was somewhat difficult in areas.