Whether you’re on vacation near a hiking hotspot or happen to live in a place where trails abound, hiking can be a great way to change up your cardio routine. Depending on your stats and the intensity and duration of your hike, you can burn 500 calories or more in an hour of hiking (based on a 150-lb. person). Trails with several hills or mostly uphill climbs allow you to burn hundreds of calories more than cross-country treks.