  After a brief review of galactic cosmic rays in the GeV to TeV energy range,
we describe some current problems of interest for particles of very high
energy. Particularly interesting are two features of the spectrum, the `knee'
above $10^{15}$ eV and the `ankle' above $10^{18}$ eV. An important question is
whether the highest energy particles are of extra-galactic origin and, if so,
at what energy the transition occurs. A theme common to all energy ranges is
use of nuclear abundances as a tool for understanding the origin of the cosmic
radiation.
