Crothers' Woods is an area of the Don River valley in Toronto, Ontario, Canada. It is approximately 25 ha in size and consists of woodland, meadows, wetlands, and an assortment of past and present municipal uses. The wooded area has been designated as an Environmentally Significant Area (ESA) by the Toronto and Region Conservation Authority. An ESA designation is useful in highlighting valuable natural areas but this does not affect planning uses. The area is currently zoned as undeveloped parkland. Crothers' Woods was named after George W. Crothers who built a manufacturing company called Crothers Caterpillar. The plant built heavy machinery for the construction and mining industries. The company stayed until 1979 when they relocated to Vaughan, Ontario. Murhal Developments bought the property and eventually sold it to Loblaws which built the store that currently occupies the site just off Millwood Road.
While there are no clear boundaries, Crothers' Woods is generally thought to include both sides of the valley that extends from Pottery Road and the Bayview Avenue extension in the south and west to the Millwood Road bridge in the east. Further east, good quality forest exists on the north side of the valley for another 1.2 km to the western edge of E.T. Seton Park.
The land in this part of the valley is owned by the TRCA and managed by the city of Toronto's Parks and Forestry Department.