RECREATION
Gliders, also called sail planes, have no engines and rely on air currents to power them. They soar as quietly and gracefully as birds, their use becoming popular here in the 1970s and 1980s. Desert hills of the Grand Valley generate strong updraft thermals for soaring. Bill Hill set an international record by flying a 300 km triangular course at an average 120 k.p.h.
(Joe Kendrick Photo)