Clearwater lake is a part of the Nokasippi Watershed. It is also part of a larger watershed known as the Mississippi River - Brainerd Basin.
Mississippi - Brainerd
There are a lot of data collected by the DNR and you can play with their report generators to determine a lot of fun things. Start here Watershed Health Assessment Framework website: https://www.dnr.state.mn.us/whaf/index.html
Our water starts in underground springs and flows through the Nokasippi watershed and eventually into the Mississippi River. On it's way it flows through Nokasippi River to Eagle Lake, Nokay Lake, Upper South Long, South Long, Pond Lake.
Drone Video of Nokasippi River - 2022
Drone Video of Nokasippi River - 2018