It start with really nice road, good surface, lot of nice corners and views. Then form Payal they are building new road and it's wide gravel road with sandy parts. From San Agustin to park it's more narrow, sometimes steep... Park is nice, but I expected more, reminds me similar easily accessible cascades near Palenque
I did it first by bus and I was suffering. When I found that in Huatulco it's possible to rent himalyan, I needed to do that road again and I really enjoyed it. Good surface except some tricky parts, really nice corners, San Jose del Pacifico and San Mateo Rio Hondo on the road, which are nice villages.
Miles and miles with corners! Some sweeping curves at the end of the route, but mostly low speed corners. Beautiful scenery with several smaller villages. Though a lot of tourist traffic, Guardalest is worthwhile paying a visit on this route. Nice road surface.
This is a beautiful mountain road with exceptionally good tarmac. Extremely good fun due to the amount and variety of bends. It's a very popular road amongst local riders. Best I've ridden hands down.
Just make sure you visit the main square in Montanejos (it's full of friendly fellow riders). But then, you'll need the break as your forearms will be burning!
View on the lake is nice and then there are lot of twisties in the forestal road.