Rif Mountains, near Chefchaouen
Akchour
The trail up the Akchour valley follows a turquoise river through the Talassemtane forest to a waterfall (or a longer route to the 'God's Bridge' rock arch, for those with more time). It's an easy add-on to a Chefchaouen stay and a good contrast to the town's blue lanes.

Akchour in photos
Itineraries that include Akchour

Coast & Cities4 days
4-Day Chefchaouen and Akchour Tour from Tangier
Tangier is the closest departure point to the Rif, which makes this the most efficient way to see the blue town and its waterfall valley without a long drive on either end.
