This is a relatively quick ride that heads toward the Sierra Nevadas via the Carretera de la Sierra but turns off toward Dúdar. After about 9km of easy climbing on the road, you’ll turn left onto the dirt and keep climbing for another 4km to reach the ridge between Quéntar and Beas de Granada. Ride the ridge for 1km until you reach the road and turn left to descend into Quéntar, then right to return to start the way you came.
Admittedly this has more pavement than you’d probably like, and that’s easy to fix, but if you only have 90 minutes for a ride that takes some work but is worth the views, then this checks those boxes. This loop runs counterclockwise.
The GPX file for this and all the Trails of the Alhambra rides are available to download for free with bike rentals.