| What it is | A single bouldering route |
| Length | Short, usually under 6 m |
| Graded | V-scale or Font |
| Difficulty | Beginner to elite |
A boulder problem is a single bouldering route — a short sequence of moves on a boulder or wall, climbed without a rope. The name reflects bouldering’s puzzle-like nature: each problem has a defined start and finish and is ‘solved’ by working out the right sequence. Problems are graded on the V-scale or Font scale.
Why ‘problem’?
Bouldering is a movement puzzle — figuring out the sequence and refining the beta is half the challenge.
Grading
Rated on the V-scale or Font scale; convert with our grade converter.
Protection
Pads and a spotter, not a rope — see crash pad.
Frequently asked questions
What is a boulder problem?
A boulder problem is one bouldering route: a short, ropeless sequence of moves on a boulder or wall with a defined start hold and finish. You 'solve' it by figuring out and executing the right sequence, protected by pads and a spotter rather than a rope.
Why are they called problems instead of routes?
Because bouldering is treated as a movement puzzle — short and intense, where working out the precise sequence of moves is as much the challenge as the physical effort. The 'problem' framing captures that puzzle-solving spirit, distinct from longer roped 'routes'.
How are boulder problems graded?
On the V-scale (V0 upward) in the US and the Font scale (6A upward) in Europe, both rating the difficulty of the hardest moves. Use our climbing grade converter to translate between them.
Sources
- Bouldering basics — American Alpine Club