To qualify for this challenge, you will have had to find at least one cache in each of the 21 levels of elevation (in metres): <0, <25, <50, <75, <100, <125, <150, <175, <200, <250, <300, <350, <400, <500, <600, <750, <1000, <1250, <1500, <1750, <2000, <2500, and <5000.
The only excluded cache types are Locationless (reverse) caches and Unknown, as their elevations are for the posted coordinates not the final. Otherwise all caches past and present qualify for this challenge. Your elevation stats on Project-GC would look something like this:
You can check if you qualify for this challenge here:
