Crater Lake is a beautiful and eerie place. Back in 1959 my parents took my brother and I there and we stayed a couple of days. We hiked around the lake and picked up 'Thunder Eggs' (rocks hit by lightning) ... The lake is beautiful but it seemed very quiet to us. My father knew a lot about Native American legends and told us about the Lake Monster, the legends of Big Foot and a ancient Indian story about an entity that attacked hunters in the woods.
Are there monsters in the lake? I don't know but there have been Big Foot sightings all over the Cascades.