From the link provided.
However, from October to June, the park turns into a snow covered wilderness, receiving an average of 533 inches of snow annually. A wide variety of trails and unplowed roads provide winter enthusiasts with access to breaththaking views, open slopes, and dense forests, making Crater Lake ideal for both daytrippers and backcountry campers who are prepared to face the challenges of winter.
By early spring it is typical to have 10 to 15 feet of snow on the ground. While snowfall is common in the Cascade Mountains, Crater Lake is one of the snowiest areas in the entire Northwest.
Even in the long, harsh winter months, Crater Lake National Park can still provide the hearty visitor with a phenomenal outdoor experience.
You see, Crater Lake is at the top of a volcano that blew its top, ala Mt. St. Helen. The lake is at about 6,000 feet. That's a big hump to do some pleasure boating. The park, btw, is celebrating it's centennial. I think this lady is spinning some bs to to some sunbirds.