It was....

...7700 years ago, when Mount Mazama blew,
it must have been some explosion, I wasn't there. Were you?
It formed a caldera, and it's very deep you know,
and slowly, over time, it filled with rain and melting snow.

Now we have Crater Lake, one of the deepest in the world,
1943 feet deep, so the national flag was unfurled,
it's a National Park, open for us to see,
if we go to Oregon, and don't go to see the sea.

Take a look at the very clear blue water here, reflecting the sky,
a small island call the Phantom Ship, going sailing by,
it must be a very pretty sight, but there is still cold air,
high up on these mountains, and a view that's rare.

This is Hillman Peak, and look at all the rock,
it's left over from the lava flow, it must have been a shock...
...to see this all left over, after all that time,
but if you were to visit, it would be worth the climb.

It's here in different weather too, snow, fog and rain,
but I'd like to see it on a good day, if now it would be a pain,
maybe still worth viewing, but I'd want to see the blue;
so might not this be the trip worth taking for you?

Enjoy!