The northern forest, and why La Palma has water
La Palma is «the beautiful island» for a measurable reason: it is the wettest in the archipelago. And that moisture does not come from rain alone, it comes from the north-eastern forest. Los Tilos is a Biosphere Reserve and the place where the system that keeps the island green makes sense.
The forest that manufactures water
The laurel forest of northern La Palma lives on the same thing as Anaga or Garajonay: horizontal precipitation. The trade wind pushes fog against the slope, the fog condenses on the leaves and the water drips to the ground. It is water that appears in no rain gauge.
La Palma’s difference is scale. The island is high, young and sharply featured, and its northern flank takes the trade wind head on. The result is a system of ravines with running water that is rare in the rest of the archipelago.
The water galleries, the part nobody mentions
That water is not only used at the surface: the island is perforated by galleries, horizontal tunnels dug to capture groundwater. It is historic infrastructure and it is the reason a volcanic island sustains the agriculture it does.
Knowing this changes what you see walking the northern ravines: the channels and conduits are not rural decoration, they are the island’s hydraulic system.
What to know before visiting
- It is a wet forest, which means slippery ground. Wet rock, moss and roots. Footwear with real grip.
- Ravine trails can include tunnel sections. Where they do, a torch: not optional — you genuinely cannot see.
- It is colder than the coast suggests and the humidity sharpens it.
- Recent rain rules. In a ravine with running water, what you can do depends on that day’s flow.
Why it is worth it even in rain
Because this forest is the wet climate. Seeing it in fog and drip is not bad luck: it is seeing the mechanism that makes La Palma green. A sunny day gives better photographs; a foggy day explains the place.
Frequently asked questions
›Why is La Palma greener than the other islands?
Because it is high, young and its northern flank takes the trade wind head on, so the laurel forest captures a great deal of horizontal precipitation: fog condenses on the leaves and drips down. Add the galleries, tunnels dug to capture groundwater.
›Do I need a torch on the northern trails?
On ravine routes that pass through tunnels, yes, and it is not optional: you genuinely cannot see inside. Confirm your itinerary before setting out to know whether it includes such sections.
›Is it worth going in fog?
Yes. Fog is this forest’s climate, not an exception: it is what keeps it alive through horizontal precipitation. Sun gives better photographs, fog explains the place.