Took a guided off-road trip from Pai that was a blast. Highly recommend to anyone with a true off-road bike, although we slogged it through on 250 AX-1s. North to the Burmese border and tiny villages that the trekkers don't go to. Contact the Baantawan Guesthouse ( [email firstname.lastname@example.org]email@example.com[/email], 053-698116) just downstream of the bridge and on the River Pai. Thip is the guide and he must know the off-road trails better than anyone around.