Skate geohash achievement
Note: This achievement is the generalization of the proposal currently called Ski Geohash proposed by avid skier the_ru with (hopefully) less inconsistencies in the definition. I resubmit this under a more generic name, but if accepted, it shall deprecate the Ski geohash proposal.
Claim this achievement if you reach a hash using skis or skates, or any other human-powered device that is propelled in a skating fashion. Using cars, snowmobiles, dogsleds, etc, to go part of the distance is not allowed (this includes being pulled by such a vehicle). To avoid damaging your equipment, you may take it off for short distances (e.g. skis over non-frozen ground). However, a significant part of the distance must be traversed skating - you can't just carry them around and call it a Skate geohash!
Acceptable devices may skate on water, ice, or land. Skating on small wheels is acceptable, as in the case of rollerskis, skateboards and inline skates. Bear in mind that waterskis may also not be pulled by a vehicle. Downhill skis may be used, but you may not use a ski lift to get to the top. And no, electric variants of skating equipment are also not allowed.
Actually achieving this on ice or snow is encouraged, in which case the achievement ribbon shall be available in a special winter edition. The name of the ribbon may be varied according to the device used - e.g. Ski geohash, Waterski geohash, Inline skate geohash, etc. - feel free to claim it multiple times for any variant of skating you have succeeded in.
Bonus points if you achieve this on a skateboard on Go Skateboarding Day!
 Ribbon examples
the icons are not yet the final ones
|Rudolph earned the Ski geohash achievement|
|LinearT earned the Inline skate geohash achievement|