The log can be signed prior to meeting the challenge requirements, but the challenge cannot be claimed as a find until all requirements are met. Please report any container issues to the CO for repair. Any signatures on unauthorized replacement containers will be deleted by the CO. The average D/T rating for these caches is 1.5/1.5. The higher rating takes into consideration the requirements for meeting these challenges. Please be aware of the approach of other incoming flights on your taxiway and pull safely to the side to avoid collisions. Have fun and thanks for flying KCI!
And now for the challenge:
Since we began caching we have traveled from coast to coast and the variety of scenery is spectacular. Along the way we cached below sea level and up into the mountains. The requirement to log this challenge is to find a cache within every 500 ft range from below sea level to 9000 ft. (There are a total of 19 caches that must be found to qualify)
Example: A cache must be found below sea level, another between the elevations of 0-500 feet above sea level, another between 501-1000 feet, 1001-1500 feet… all the way up to between 8500-9000 feet. Here is my summary from the macro ElevationRangeReport in GSAK. Thanks to "I Challenge You" cache GC1F8Z1 for the idea.
Also there is a Challenge Checker #19985 on Project-GC.

Final:
N -0.151
W +0.762
FTF goes to Ragfoot