I believe this is Timberline lake.  The entire team stopped for lunch and rest before the last push to camp #4.  It's just about one mile to Guitar Lake, our last camp before going over Mt. Whitney.  I'm battling sunscreen in the eyes as everyone else enjoys themselves... Mental note: Bring Paba-free sunscreen next time.

Our route to Guitar Lake from Timberline is along the left bank, rising up through the cut between the nearest mountain ridges.