boulder

a very large, rounded stone or rock that is found in the ground or lying on the surface of the earth

roca grande, roca suelta

Collocations a boulder · boulders in a field

• The path was blocked by a huge boulder.

  El camino estaba bloqueado por una enorme roca.

a sport in which people climb up large rocks or stones, often using ropes and special equipment for safety

escalada en rocas grandes

Collocations bouldering route · indoor bouldering

• He's a keen boulderer and has climbed many challenging routes.

  Es un apasionado de la escalada en rocas y ha escalado muchas rutas desafiantes.