New "Heat Map" Reveals Chicago's Favorite Running, Cycling Routes

The Strava fitness map show exactly where Chicagoans love to work out.

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In a new “heat map” released by the fitness app Strava, glowing lines crisscrossing Chicago show where people most love to run and ride their bikes. Perhaps not surprisingly, the hottest routes cover the 606 Trail, Jackson Park, Millennium Park, and the Lakefront Trail.