Tributaries to Devils Lake The approximate locations of each of tributaries to Devils Lake. The main sources of fresh water into the lake are Rock Creek, Side Creek, Thompson Creek, Neotsu Creek and the drainage from Spring Lake. Soon to be added, click on any of the tributaries and you will see thumbnails of images of each very location. Click on the thumbnail and view a full size version of each location. Follow the link at the bottom of the map to open a full sized window for easier navigation.