Circle M Ranch

"The Forest Rangers" was filmed at what was then the Circle M Ranch in Kleinburg, Ontario. Can anybody tell me more about the Circle M, or what has become of the property? My late mother, who was born and raised in Toronto, stayed at this ranch very often; she was a professional Western rider, and was said to have met Roy Rogers at the ranch. If anybody reading this happens to have stayed at the Circle M during the 1940s, my mom's name was Ida Leo. Any information or recollections at all would be profoundly welcome!!! Thanks!!!