Just after dawn on spring and summer Saturdays, downtown Cleveland is a jogger's paradise. If you live in the 'burbs, ride the RTA to East Ninth Street. To begin, jog away from the lake till you're outside Jacobs Field. Turn onto Eagle Avenue, which borders left field, and peer past the gates as you run. The grass sparkles with dew, and the park is as eerily silent as an empty cathedral. Duck behind Gund Arena and head north to Public Square. Take the steps going down behind the old Court House, heading toward Cleveland Browns Stadium. On the Touchdown Club bridge, dash across mock football yard markers toward an end zone. At the stadium, the endorphins kick in, and you're invigorated for the final stretch. Follow Erieside Avenue down to the harbor and jog behind the Great Lakes Science Center to the Rock and Roll Hall of Fame. Pass Janis Joplin's psychedelic convertible and the ZZ Top hot rod before emerging onto East Ninth again for the grand finale, an uphill run that returns you, exhausted but exhilarated, to the RTA station.