The 16th Street Mall is forbidden fruit for the bicyclists of Denver. Its wide-open expanse, free of cars and trucks, offers a direct route across downtown Denver, bridging Union Station and Civic Center. The pavilion is a tempting alternative for pedal-pushers who are frustrated — or scared — by the patchwork bicycle routes across the city’s urban core. “The 16th Street Mall would be a great corridor, but you’re kind of banned from there,” said cyclist Brian Schroeder.