The route is spectacular but long …more demanding than you might think (the 16km route registered as 23km on my Garmin). Guide was fantastic. No one was rushed, loads of rests. There was 200m of climbing and over 1000m of decent so you really need a good pair of shoes/boots, 2l of water and perhaps a pair of walking poles.
The Caldera Taburiente trail is a journey through the island's only national park – and it's the star of La Palma's popular hiking scene. You'll walk 16 kilometres along the snake-like trails – down 800 metres of negative elevation – into a volcano crater basin, gaze out over incredible scenery and visit La Cascade de Colores – a waterfall where iron-rich waters create a rainbow effect in the rock.