Permits to go to the top of the peak of Teide are now available through the internet. It’s free, simple, and takes about 3 minutes.
The specific link to make a reservation is HERE, with general information (in Spanish) HERE, both links being part of the more general national park reservations site www.reservasparquesnacionales.es.
Those wanting to go right to the top are reminded that for protection of this conservation area, numbers are restricted to 200 people distributed in groups of 50 every two hours between 9 am and 5pm. C24H