The above coordinates will bring you to the bottom of Felker's Falls where stage 1 is located.
From here look around. Count the number of nearby caves you can see (around 2m or more wide). Multiply that number by 500 and add to 43 10.757 and 079 45.636 (Checksum for North Coordinate is 24)
I have posted an extra coordinate for the recommended trail to the final.
Make sure you bring a camera! The waterfall is beautiful!
Prize for the FTF. Thanks to Sharon12 for the beta-test.
You can check your answers for this puzzle on GeoChecker.com.