These first photos were taken by Scott from his plane. The scenery is the Kenai Peninsula. I'm not sure if this is Kenai Lake, or Skilak Lake. The milky color is glacier meltwater.
Shortly thereafter, there were many huge forest fires that burnt off the dead trees, and caused Birch trees to flourish.
There are hundreds, if not thousands of lakes on the Kenai Peninsula. Many of them have very stagnant water that is unsafe to drink. I'm not real sure of the cause other than extensive, boggy habitat.
The water in the mountains tends to be safer than the water out on the flat areas.
After about 50 miles, Turnagain Arm ends, and the highway turns onto the Kenai Peninsula.