I’m heading out there in March (staying in Arguineguin) and have been planning some rides. One important thing that I’ve learned is that the coast road to Mogan (between Taurito and Mogan) is closed! It’s been closed to cars for a few years due to landslides, but apparently until fairly recently cyclists and pedestrians could ignore the signs and get through fine, but now I hear it is properly blocked. The main highway slightly inland is open of course, but you can’t ride a bike on there. So my plan is to bypass it via the ferry between Puerto Rico and Mogan.
Here’s some useful info: