Crothers Woods is an area of the Don River valley in Toronto, Ontario, Canada. It is 52 hectares (128 acres) 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.