Cawthra Creek rises in the vicinity of Cawthra Road and Dundas Street and flows due southeast, reaching Cooksville Creek just north of Lakeshore Road. All but a 320 metre stretch in Dellwood Park has been buried.
History
The creek was progressively channelized and buried as the lands around it developed. South of the Queensway, much of the subdivisions were built as the creek was still open, but as flooding from north of there became a problem, in the late 1970s, all but the Dellwood Park stretch was put underground and the southern tip was diverted west to Cooksville Creek from its original route directly into Lake Ontario. The last above-ground reach north of Dundas was buried in 2014 as part of an expansion to Dixie Union Cemetery.
