One of Rochester’s largest parks at 1500 acres, Black Creek Park is located in the town of Chili.
From April to October, park is open 7:00am to 11:00pm. From November to March, Monday through Thursday, park is open 7:00am to 4:00pm. Friday through Sunday the park stays open from 7:00am to 11:00pm. Pets are allowed while on a leash. Carry-in carry-out is the rule of thumb for garbage.
Being such huge park, you can imagine there are quite a few trails at Black Creek Park. There are well over 8 miles of trails with a majority being well-marked. The attached map does provide an indication for starting and ending points and the general path of the trail. Work will be done by Rochester Parks to make sure these trails make it to Google Maps.
Monroe County does provide a map which you can look at here: Park Map