| Incline | Description |
| 1 |
Very little hill or stair climbing |
| 2 | Some moderate hill or stair climbing |
| 3 | Some significant hill or stair climbing |
| 4 | A good deal of significant hill or stair climbing |
| 5 | Many steep hills or high altitude trails |
| Terrain | |
| A | Almost entirely on pavement, probably suitable for a baby stroller |
| B | A significant part of the walk takes place on well-groomed trails with very little more difficult terrain |
| C | A significant part of the walk takes place on somewhat difficult terrain (rocky/rooted paths) |
| D | A significant part of the walk takes place on very difficult terrain |
| E | The majority of the walk takes place on very difficult terrain |
