Cosmic Rays - and their origins - have puzzled and fascinated Physicists for over a hundred years. Within our Milky Way Galaxy,
particles are known to reach energies beyond the so-called Cosmic Ray “knee", a spectral break at ~3 PeV in the all particle cosmic ray spectrum.
However, finding evidence for the particle accelerators reaching PeV energies - PeVatrons - has proven elusive.
Only within the last five years have astrophysical sources of gamma-rays above 100 TeV been identified;
gamma-rays that are produced through interactions of particles with PeV energies. Many of these sources are associated with the most energetic pulsars known.

In this talk, I will review the current status of the research and discuss implications for our understanding of pulsar environments.
Open questions include: Which particle types are being accelerated and generating the gamma-ray emission?
How are the particles transported through the surrounding medium? What is the maximum energy limit for particle acceleration in pulsar environments?
In the near future, data from current and forthcoming facilities will help us to address these questions.