The Eramosa Karst is a provincially significant Earth Science Area of Natural and Scientific Interest in Ontario, Canada, located in Stoney Creek, a constituent community of the City of Hamilton, and immediately south of the Niagara Escarpment.

[1] It exhibits sixteen different karstic geological features, of which seven are provincially significant,[2] and is considered to be the best example of karst topography found in Ontario.

Many dolines in the Eramosa Karst are formed by a combination of soil piping and erosion of the glacially deposited sediments, overlying the bedrock.

Dry valleys were formed prior to the development of underground stream passages, representing a former route of springs before they were diverted by sinkholes.

However, the Feeder Area, where the streams originate, is managed by the Ontario Realty Corporation, which intends to sell it for residential development.

[7] Local scientists and politicians urge the Ontario government to abandon its plans and incorporate these lands into the conservation area, arguing that geological and biological diversity of Eramosa Karst will be severely diminished, should the development take place.