What can I do in Morocco in 13 days?

Thirteen days sits one notch below the full fortnight, and my advice is almost philosophical: don't use the extra days to go further, use them to go deeper. By thirteen days you've comfortably got the whole vertical sweep of the country — red city, Sahara, Fassi medina, blue Rif, Atlantic — and the smartest thing you can do is add a night to whichever of those grips you, not chase a fifth region you'll skim.

A build I'd happily put my name to: three nights Marrakech, a gorge night on the way south, two nights in the Merzouga dunes, two nights Fes, two nights Chefchaouen, and a coastal or capital finish. That already accounts for most of the thirteen days, and it's deliberately generous — you've got proper time in the desert and a second day in both Fes and Chefchaouen to wander without an agenda.

The floating day or two is the luxury. Maybe you give Marrakech a fourth night for a cooking class and a day trip to the Ourika waterfalls. Maybe you stretch the desert to three nights and ride deep into the erg, sleeping at a remote camp far from the day-trippers. Maybe you fall for Chefchaouen's calm and just stay put. I'd plan thirteen days with one stop intentionally left open, to be claimed by whatever surprises you in the first week.

The honest caution is the same as ever: thirteen days is plenty to be greedy with, but greed here means tranquility, not mileage. Resist the agent who fills every box with a new city. The travellers who get the most out of two unhurried weeks are the ones who treated a couple of those days as nothing-planned days — a rooftop, a market, a long lunch, no transfer. That's the real reward of the length.