Mike Tyson is building a marijuana ranch in California According to The Blast, the former world champion boxer and his business partners Robert Hickman and Jay Strommen started construction on the 40-acre ranch on Dec. 20 in California City. The news comes just as recreational marijuana use became legal in the state on Jan. 2. But it won't just be a growing operation. The ranch will reportedly feature a plant supply store, an edibles factory, an extraction facility, an amphitheater and campgrounds. Additionally, research will be done on how best to use and apply the healing properties of marijuana. Tyson's cannabis farm will focus on "high quality strains of THC."