  The valence region is exceedingly important in hadron physics since this
region not only defines a hadron but also is an excellent discriminator of
nucleon structure models. Present uncertainties in light quark distribution
functions at high x could also impact high energy physics. Here we will
describe a new generation of experiments at Jefferson Lab that is aimed at the
high x region of the nucleon. It is noted that the proposed Electron Ion
Collider could explore the high x regime.
