If you can drive a scooter or want to rent a car this loop is very nice: CM - Hang Dong - Samoeng - Mae Rim - CM
It takes about 3 hours and there is almost no traffic on weekdays. You will pass stunning view points, you can discover a hidden cave (which is a bit difficult to find), a very nice big coffee shop 20 km before Samoeng, strawberry fields in Samoeng and then there are many activities like bungee jumping, shooting ranges, ATV and buggy rentals, go-carriage, paint-ball and some parks, restaurants etc. near Mae Rim. With a scooter or car you can also go up the mountain and explore Wat Doi Suthep on your own. Please always wear a helmet, drive carefully and do not drink alcohol and drive!