This cache is at the location.
As a challenge you have to have completed the Mica level of the Discovery Awards for Earthcaches. That means you have found 100 Earthcaches
I can check it by looking at your stats. Feel free to sign the log, but do not log as a found until you have completed the challenge. If you have found over 250 please let me know (in you log). If there are enough the qualify, then I will look at a higher number.
Thanks to Rikitan for writing this checker
Haqre ebpxf ng gur onfr bs n cbfg.