Por un escritor de hombre misterioso
A "highball boulder problem" is a rock climber's slang term used to refer to a high and scary boulder problem where a rope is not used for safety.
Climb Loman's Highball, Boulder
UKC Articles - ARTICLE: Franco Cookson's Guide to Highballing
Inflating Grades and Egos — James Lucas
What Is a Boulder Problem? - Bouldering Boss
What Is Bouldering: A Complete Guide
Should We Rethink the Ethics of Highball Bouldering? - Yahoo Sports
Scottish Classic Boulder Problems: Craigmaddie
First Ascent: Canadian Sends Hanging Boulder Problem
6½ Reasons Why Bishop Rocks - Bishop Visitor Information Center
The Best Classic Bouldering Spots Around the U.S. - The Summit Register
Squamish Highballs Part 1