Yes, you do. You can apply UpTo 2 months for arrival.

Mauritania is one of the safest countries in Africa. Nothing to worry about concerning.

November to March — cooler and more comfortable.

Talk to a doctor. Yellow fever rules and some vaccines may apply.

The money is the ouguiya. People speak Hassaniya Arabic and French.

Bring layers, sun hat, and sturdy shoes. Tours use 4×4 cars and some walking. Be prepared as the weather can be cold and sometimes warm. If you are taking the train, bring some clothes that you will not likely use after the train.

Yes, the train is possible, with us is guaranteed.

No, the train doesn’t have a fixed schedule. It could be early it would be very late. Be patient and prep for waiting.
Always have an extra day at hand when you are planning on taking the train. Never book your flight to be, the day after riding the train. As the train may be cancelled sometimes. So having your flight after the train may lead to missing your flight.

Yes, you can. But it’s recommended that you travel with a guide?