Well I'm in my 60's. It took us (3 women) 5 hours to do the walk from Tamaimo and back. The start of the walk is sign posted but I must say although the rest of the path was not marked the path was easy to follow. It would be up to you the individual to decide how difficult it is for you. The way we took, which was to turn left at the sign for Puerto Santiago, was walking up for the first couple of hours. We sort of lost the path a bit at the top but managed to get down to the cross then it was down over very rocky terrain. If you take your time and enjoy the views I think anyone who is used to walking will enjoy this walk. I would definitely class this walk as medium to difficult, but well worth the effort. We've done the walk from Puerto Santiago up to Tamaimo, Tamaimo to Santiago del Teide, Santiago to Valle Arriba and a couple of walks from Los LLanos to Chinyero which take you through the National Park. One from Erjos down to Los Silos which incorporates more spectacular views and a water fall. Hope this gives you a few more choices.