Visitors are limited to 600 a day, with a maximum of 50 hikers joining the route every 30 minutes.
To heighten the thrill, several sections of the path have glass floors.
The walk is linear rather than circular, with starting points both in Ardales and Álora.
Spanish monarch Alfonso XIII walked the entire pathway to inaugurate the Conde del Guadalhorce Dam in 1921, hence its name.
The pathway is open to the public Tuesday to Sunday. Entrance is free until the end of September, after which tickets will cost €6 each.
Over 48,000 reservations have already been received from hikers in Spain, US, UK, France, Germany and Portugal.
As much of the original Caminito has been retained as is possible, with treacherous sections bypassed by the new path above.
The reopening of the Caminito del Rey has made headline news around the world.
Lonely Planet has included The King’s Pathway among its top 10 new travel experiences for 2015.
Tipped to become the top tourist attraction in Andalucía – if not Spain as a whole – €2.8m is being invested in transport infrastructure, visitor facilities and hospitality.
The initiative is expected to generate €20m annually and create more than 180 permanent jobs.
For lots more information and to reserve your tickets, visit www.caminitodelrey.info