Miami is at lower elevation than Denver. If a pendulum clock…

Miami is at lower elevation than Denver. If a pendulum clock keeps perfect time in Denver, will it run fast or slow in Miami? (Note: “runs fast” means 1 second (1 period) on the clock in Miami is shorter than on the clock in Denver; “runs slow” means 1 second (1 period) on the clock in Miami is longer than on the clock in Denver.)