Bouldering also has a number of grading systems: Hueco[?] V grades, Fontainebleau technical grades and route colours and overall difficulty grades, Peak District B grades, British technical grades.
... of the census of 2000, there are 17,006 people, 5,316 households, and 4,454 families residing in the town. The population density is 943.4/km² (2,444.3/mi²). ...