Correct, the road into El Valle is horrible, and no other way to
Playa Rincon other than the HIghway.
The road to Playa Valle is at the top of the hill after you have left Samana and wound your way around Rt 5 and come to where the road starts to straighten out. There is a sign there to make a left turn(coming from Samana). Follow the paved road for about 10 min until it ends and then proceed down a steep slope which seems like a dry river bed. From here there is about 6-8 kms of rough road. You will pass Samana Zip Line and then the condition of the road gets a little flatter and somewhat better. The river is normally about a foot deep and should be no problem. Once you have crossed the river it is about another 10 minutes to the beach. It is worth the trip. Combine the zip line experience with Playa Valle and you can spend a day there. I did the zip line last year. There are 13 zip line stations and it is well worth the money. They also have a nice natural pool and small waterfalls where you can cool off after the experience. At the beach there are a few restaurants where you can eat and drink. Fun day.
LTSteve
once again... you can not take that trial by quad!!! The locals will say yes but they are not used to quads. You kill yourself!!! I know that trail very very well.
when yo want a fun route take a fun route and not a dangerous route. Fun is el Limon to Playa el Valle for example. Or from el valle towards Loma pinon de azucar.