Joseph M. Hammons has been climbing from a very young age and climbs at least twice a month at Joshua Tree in Yucca Valley, Calif. When he climbs he free climbs which is a form of climbing without a harness or rope. - Joseph M. Hammons has been climbing from a very young age and climbs at least twice a month at Joshua Tree in Yucca Valley, Calif. When he climbs he free climbs which is a form of climbing without a harness or rope.