Awesome is the only word for it.  The vistas of spectacular rock walls and
formations are about as good as it gets.  Don't forget to look back over
your shoulder for a great view of
Canyon
Lake before you begin your
descent
into Boulder Canyon.

Great intermediate hike.  I did it as a short-shuttle hike from Canyon Lake
taking Boulder Canyon and Second Water trails back over to First Water
trailhead.  Lots of
neat things
to look at in the canyon.  The creek is gorgeous when its
running. 
The old Indian Paint Iron Mine is
just up in the saddle north of Battleship Mtn. as you depart the creek bed. 
Enjoy!