The last stretch of this journey, after you have turned left off the main route 13 to avoid going up to the Chinese border at Boten (think the road is 13B),is not a major asphalt as marked on the Laos Map 2005. There is some major upgrading going on here. The first half of the stretch is unsurfaced hardcore, no loose gravel and not a problem. There is then a short stretch where the road is down to one lane and you may have to wait for diggers to finish working before you are allowed passed. The final stretch into Luang Nam Tha is dirt but very smooth and dry. None of this is a problem on a road bike but it will slow you down so you need to take this into consideration especially if you are riding from Luang Prabang to Luang Nam Tha in one long day. It wouldn't be much fun in the dark.
Helen and Dave
Look at our photos:
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Helen and Dave
Look at our photos:
Link removed