  Broad and unexplored kinematic regions can be accessed at the LHC with
fixed-target $pp$, $pA$ and $PbA$ collisions at
$\sqrt{s_{\rm{NN}}}=72-115~\rm{GeV}$. The LHCb detector is a fully-instrumented
forward spectrometer able to run in fixed-target mode, and currently hosts a
target gas cell to take data in the upcoming Run 3. The LHCspin project aims at
extending this physics program to Run 4 and to bring polarised physics at the
LHC. An overview of the physics potential and a description of the LHCspin
experimental setup are presented.
