Bits and pieces of a 22-degree halo around the Sun can be seen many times throughout the year. Less commonly seen is a complete 22-degree halo around the Moon at night. The reason is simple, it takes nearly a full moon to provide enough light.
The Kootenay-Lake Website offers a discussion and more pictures of the local haloes.
A full moon and a thin veil of cirrus provides the ingredients for a complete 22-degree halo over the Lake. A few stars can be seen through the cirrus.