|natural = ridge|
|A mountain or hill ridge|
|Used on these elements|
|Tools for this tag|
For mapping ridges make a way along the crest of the ridge and add name=* to specify a name. The way should only be drawn as far as there is a continuous elevated crest, it should not be drawn across valleys. The way should connect saddle points and peaks, and the arrows should point upwards.
A ridge implicitly divides drainage basins, ranging from small streams and creeks to huge rivers. This tag may later be used to derive, in conjunction with river and stream tags, the exact areas and boundaries of drainage basins.
Currently not rendered. Here's the ticket discussing it: https://github.com/gravitystorm/openstreetmap-carto/issues/788