  Weak boson fusion is a copious source of intermediate mass Higgs bosons at
the LHC. The additional very energetic forward jets in these events provide for
powerful background suppression tools. We analyze the $H \to \tau\tau$ decay
mode for the Standard Model Higgs boson. A parton level analysis of the
dominant physics backgrounds (mainly $Z \to \tau\tau$ and Drell-Yan production
of $\tau$'s) and of reducible backgrounds (from $W+$ jet and $b\bar{b}$
production in association with two jets and subsequent leptonic decays)
demonstrates that this channel allows the observation of $H \to \tau\tau$ in a
low background environment, yielding a significant Higgs signal with an
integrated luminosity of about 30 fb$^{-1}$. The weak boson fusion process thus
allows direct measurement of the $H\tau\tau$ coupling.
