Just south of San José, on the border of a town named Aserri, a 30m high boulder jets out of the hillside and is well known by locals due to its prominence on the landscape.
If you wish to visit Piedra de Aserri it is recommended by locals that you do so in a larger group of 5 to 10, stating that theft and muggings have been issues in the past.
A massive boulder displaying a large white cross on top composes all the routes on a single wall. For most of the wall the bottom 5 meters are vertical and therefore support the majority of the crux moves before the wall leans forward slightly and the climbing turns to slab. The top of the wall has some vegetation that can easily be removed, or avoided. Unfortunately, it would seem that a teenage ritual is to throw garbage off the top of the rock, and therefore some of the vegetation acts as a catch basin for debris. Likewise watch for glass at the bottom of the wall. The view while standing on top of the boulder is worthwhile, and given the accessibility to the top, this is one of the few climbing in Costa Rica where topping out is an option.
Unique to any other climbing in Costa Rica, at Piedra de Aserri you will find tons of small knobby rock protrusions that act as both crimps and pinches. As you stand with all your weight bearing down on a knob the size of a black bean, the thought of the tiny protruding rock breaking off commonly drifts through your mind, however the rock is surprisingly strong and of good quality. The texture of the rock is very rough, and finger pads wear down fairly quickly.
The slab nature of the rock provides finger strength moves with key balancing poses.
Being so prominent on the landscape, it is of no surprise that Aserri was one of the first climbing areas bolted in Costa Rica. Relive some of the history and scale the climbs done by the pioneers. Climbs are listed from left to right when facing the wall.
The 30 minute walk up to the rock puts you 30 minutes from your closest food source, so it is best to plan ahead and take some food and water with you. At the base of the approach there is a small super market (point of interest A) where you can get some last minute munchies or some after climbing rehydration. Within the town of Aserri there are also restaurants, sodas, and larger grocery stores.
Things to Remember
Costa Rica, more often than not, is an adventure to climb. Between trekking through jungles, fending off insects, and crossing paths with tropical animals you are sure to have a great day out. Here are a few things to keep in mind when climbing in Costa Rica:
- Bring extra water. With hot and humid often in the forecast you will drink more water than you may expect.
- Pack a brush; steel is best. Many climbs can become dirty after the rainy season and if you are climbing something that is friction dependent, you may need to do some spring-cleaning.
- It gets dark early and fast. This is especially true if you are in a ravine. Pack a headlamp or plan to get out early so that you do not get stuck in the dark.
- Bring a Spanish-English dictionary, if necessary. You never know when a couple words of Spanish will get you out of a jam.