Just travelled this route. In (so many) places the road is best described as 'broken ground' , dangerous on 2 wheels for the unprepared. Leave extra time if you are travelling in this area.
Johpa;294692 wrote: Just rode that stretch a few days ago and thought it was quite nice. Of course there are a few rough spots as you will find on just about any highland highway over time. But no major long stretches of broken gravel. My bigger problem was getting hopelessly lost trying to get from Pang Ung to Mae Ruam and then on to Wat Chan. I made the correct decision to turn back to Pang Ung while I still had enough fuel to get to a known destination.
Now ten years later this 20 km long stretch of 1088 up to Mae Sa is freshly paved and nice on any bike I think. Some light dust here and there though.It's not as bad as if you miss the turnoff onto the 1263, and stay on the 1088... that road isn't for the faint hearted (on a road bike)...