My favorite route to run at Green Lakes State Park, a NYS hidden gem.  You'll run through Old Growth forest, classic upland forest, through expansive meadows/grasslands with distant views and of course, by the parks two stunning glacial lakes, for which the park is named. Park (free) at the small parking area off of Route 290 (aka Green Lakes Rd) just after the intersection of Route 290 and N Manlius St. Google maps has this parking lot marked as 'Green Lakes Perimeter Trail'. Start/stop your run and watch at the fence (purple trail). I went counterclockwise on this route.