Big Fish Lake @ boat launch area within Ortonville Recreation Area From I-75...take Baldwin Rd.(exit #84) north to Oakwood Rd.(approx. 12 miles); turn left onto Oakwood Rd.(west) and follow to Hadley Rd.(about 4 1/2miles, just past WoJo's Nursey). Go right on Hadley Rd.(north)and travel about 2 miles, Big Fish Lake entrance is on the right. […]