After several trips to the area I think that the only interesting thing for tourists in Beni Mellal is its enormous orchard. After the orange trees, along the tops of the Dir hills are olives, figs, pomegranates, and apricots. It's very beautiful countryside.
It's also true that the town is very well situated between the Middle Atlas and Tadla, and near Bin el-Ouidane lake. The locals told me that nowadays the objective is to encourage sustainable agriculture all over.
But if, rather than orchards, you prefer the excitement of a sporting holiday then I recommend you go PACMA (the Moroccan Parachute Club) in Beni Mellal where you can free fall jump. It will give you a bird's eye view of the Tadla plain, along the Tizi Rnim pass.
I spent two nights as a paying guest in Moudj in the province of Béni Mellal. During the day I discovered the surrounding area and in particular the cliffs. The panorama is impressive and cacti are everywhere. The Middle Atlas mountains seem to really be an ideal holiday destination for families, but also for adventure tourists.
The town of Béni Mellal is situated at an altitude of 600m at the foot of Mount Tessemit which rises to more then 2,200m. It is a fortified town filled with history. Don't forget to look out for the bel Koush kasbah built in the 17th century by Mouay Ismail.
In the province of Béni Mellal, the city of Aïn Asserdoun is worth a visit with its gardens and unusual viewpoints.