If you can’t get one by booking online, know that many local restaurants, hotels and gas stations have them if you ask around in Málaga. You might pay €20 / person for one of those.
A guided walk costs 18€.
Shuttle bus between the trailheads is € 1.55 / person.
Easiest logistics is to sign on for a group tour from Málaga, the closest large city — about 1 hour away. Cost in 2022 for bus, entrance and guides was € 54. (about $56)
Logistics
you can get there by driving (A-357 from Málaga) … or by train
two entrances, one in Ardales, the other from Álora. If driving, park at the north entrance. Exit at the south entrance. You can shuttle bus back to your car.
if you choose rail, in 2019 RENFE train service offered regional daily service to El Chorro.
new Visitor Center opened in 2019
there you get a short audiovisual presentation on the adventure. Learn about the geology, archaeology, history and engineering before you set out.
There are seven parts of the route:
Visitor Reception Area Shuttle bus stop and a car park El Kiosko Restaurant
Two access areas: the path and Gaitanejo way (2.7 km or 1.5 km long route, depending on your choice).
Visitor Reception Centre and Gaitanejo Reservoir.
First Canyon Gaitanejo Gorge (2.9 km from the entrance to the exit)
Second Canyon Las Palomas Cliff
Hoyo Valley
Third Canyon Gaitanes Gorge (Desfiladero de los Gaitanes)
Last Stretch Boardwalk to the exit
Downwards path to the El Chorro Train Station, called Avenue Caminito del Rey (2.1 km).
If that all looks confusing, simply travel to the Visitor Centre and get the information there.