Lake Type Key

Does the lake have an outlet?

Elevation*
(meters)

Talus Coverage
(%)

>50

Lake Type 3

>1600

<50

Lake Type 4

Yes

<=1600

Lake Type 2

Lake Depth*
(meters)

Start
Here

>2

Lake Type 3

>1600

<=2

Lake Type 1

No

<=1600

Lake Type 2

In science, researchers use keys** developed by other scientists to identify creatures or features found. Start with the left column and work your way right, answering the questions at the top of each column.
 

*"<=" (less than or equal to)
**This Lake Type Key is created from simplified data. Scientists use a computer program to determine Lake Types at North Cascades National Park.
Teachers, you may wish to print this key out for your students (Internet Explorer: right-mouse click).