Stiller's Ford is a ford located in Redmont Fief.  It is presumably somewhere along the Tarbus River.

Beyond Stiller's Ford is an area of wild country with thick woods, high cliffs and deep rivers.

It used to be a hidding place favoured by criminals.  When Gilan was Halt's apprentice the two went through that area, chasing out the bandits that had been living there, capturing them and scattering them.

In the Lost Stories: Dinner for Five it is mentioned by Richard after Ambrose's silver shop is robbed by thieves.  The thieves leave a false trail, acting as if they are heading for the area beyond Stiller's Ford when in actual fact they are hidding out at Jenny's cottage.