The callback
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
does give you at least one location, and locations array hold sonly multiple objects if the location update was deferred before. To get the walking/driving distance, you have to store the initial location in a class variable or property. Then, when you want to calculate a distance, do as in your code above, but with the class variable that holds the initial location.