With a long weekend coming up, I am contemplating coming up from Bangkok to ride to Umphang. Trouble is, I would have to go from Mae Sot to Umphang and back in the same day (Sunday) to allow enough time to return to Bangkok on the Monday. I have read Davidfl's posting from Apr 2003 where he did the trip in one day, but he said the road was a bit rough in places and therefore pretty tiring. Colin seems to rate it (Mar 2005), but he spent the night in Umphang. So, if anyone has done the trip, there and back in the same day, within the last year, I would pleased to hear the latest.