1 An average fitness walking pace is close to a 15 minute mile. 2  But, a good pace will vary depending on your fitness level, walking technique, walking goals, and terrain.3  For general fitness walking you should walk at a pace that increases your heart rate, and you can maintain for 30 to 60 minutes. 4  Use the talk test... An average fitness walking pace is close to a 15 minute mile. 2  But, a good pace will vary depending on your fitness level, walking technique, walking goals, and terrain.