If coming by car from the Chiang Mai-Fang road Highway 107, turn left at an intersection around Km. 137 at Mae Kha Market and proceed to Doi Ang Khang for a further distance of 25km. It is a steep zigzagging asphalt road. Therefore, only vehicles in good condition and experienced drivers can make the trip.
It's also possible to take a songthaew truck from Mae Kha to Doi Ang Khang, but departures are irregular and you'll probably need to charter it.