It's recommended that you fly into Marrakesh, as travel is provided from here to/from the start or finish line.
If you're not getting our bus to/from Merzouga, it's most likely you'll need to get a taxi. From 1-4 people this will cost roughly 3000DH. For a car of 7 people it'll be about 3500DH with an official taxi/driver company. It takes 8-9 hours to go between Merzouga and Marrakech depending on traffic.
The Pioneers are led to the start line- Photo taken by Rosa Earp