If you want a scenery tour near Chiang Mai on bicycle, motorbike or car then Samoeng Loop is a good choice. Its around 90 km long and will take around 4-6 hours on bicycle.
See more at: https://nordthailand.dk/samoeng-loop-...
In this movie im entering the mountain from Mae Rim (counter-clockwise) and end up at Hang Dong 88 km later. Im starting at Pa Tan area near the super highway.
If you going on bicycle be prepared that counter-clockwise is the hard way. The way up to the viewpoint is OK, but then you have 2 more hardcore mountains to climb and they are extremely hard when you entering from this way. The last one have a grade over 31%!
Here some stats from my tour:
Date: September 3rd 2017
Distance: 88.1 km
Moving Time: 4:29:19
Avg Speed: 19.6 km/h
Avg Watts: 115 W
Elev Gain: 1,562 m