The Uri Alps are composed of two distinct groups separated by the
Susten Pass 
. The
Dammastock 
massif on the south is the most glaciated part while the northern part, which culminates on
Titlis 
, has lower summits but greater extent.
Geography
The group south of the Susten Pass forms the dividing range between the head waters of the
Aare 
(west) from those of the Reuss. In addition a small portion of the range (south-west) is located in the basin of the Rhone.