Check out the Course Map at Garmin Connect:
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Course Description:

The out and back 5K (3.1 mile) course begins at Gibby’s Irish Pub on the corner of Lake Street, just down the hill from Breitbeck Park. It continues up the hill on Lake Street, with inspiring views of Lake Ontario, the break wall and the lighthouse, winding in between the baseball fields and the park parking lot. It continues up Liberty Street and makes a right onto Schuyler Street, turning right just before 1st avenue and traversing through the NRG plant access road. It then makes a right, going up the hill on George Washington Boulevard, passing the back entrance of SUNY Oswego. At the top of the hill, between Draper and Baylis streets is the turnaround. Much of the second half of the course is downhill, tracing our steps back to the fast finish coming down the hill, with the lake on our left.