So-called because you’re often climbing a boulder rather than a cliff face, this sport is all about doing short routes (usually 3-5m) that pack a punch. The goal here is to solve “problems” that require a specific sequence of moves.The other distinguishing feature is the lack of ropes. Instead, boulderers use specialised crash pads (aka bouldering mats). Usually a spotter (or team of spotters) will be there to help guide you safely onto a pad if you fall (e.g. not head first). It’s also great training for roped climbing. Tristan Casin holds on tight in the dark | @aronhailey