A really challenging ride from Chiang Mai: be ready for 200 km and about 2.400 m climbing, partly super steep!
But you'll be rewarded with some really amazing landscapes far off the beaten tracks!
Chiang Mai - Canal Road - turn right at km 25, before Canal Road does a sharp 90° left bend - go into Mae Khan National Park and do the loop there including a short steep climb to the temple - join 1013 to Mae Wan and Mae Win - start climbing the first pass @ approx km 67 - turn left @ intersection km 80 - enjoy the natural beauty of the high valley with some minor climbs for the next 10 km - then hit the next steep one through a forest - after another short descend start to climb the final bit: 450 m climb in about 5 km.
The descend down to the intersection with 1009 coming down from Doi Inthanon is still in quite a bad state even though some road work has been done already.
But the next 24 km down to the gateway to Doi Inthanon National Park are pure pleasure, a real fast downhill on a nice road. Beware of some more narrow bents if you're speeding though.
In Chom Thong take highway 108 North to San Patong and turn left to go back to Chiang Mai on Canal Road once again.