Does anyone have any info or advice on finding routes near Ronda? I assume there's the usual Spanish issue for finding decent maps etc. The missus has just booked us a holiday there for next week 🙂

Assuming you mean the Ronda in Andalucia (there are several)try wikiloc.com searching for Serrania de Ronda, click on map and download to your GPS.Easy peasy

You could try contacting Ashley @ http://www.andaluciancyclingexperience.com/index.html he's a helpful guy but that was when I was doing a road winter training camp with them, not sure if he'd just provide you maps etc. Might be worth checking if he can do a single-day guided ride for you.