| Clue | Source | Date |
|---|---|---|
| Yellowstone, for one | LA Times Daily | 09 Jul 2022 |
| Body of water often defined as above the tree line | LA Times Daily | 18 Sep 2021 |
| Body of water often defined as above the tree line | The Washington Post | 18 Sep 2021 |
| Tahoe, for one | New York Times | 26 Oct 2018 |
| Tahoe, for one | ||
| Tahoe, e.g | New York Times | 24 Oct 2015 |
| Tahoe, e.g. |