I had a question about groomed vs powder. I've always been curious... Before you go to a resort, how do you know which runs are powder and which are groomed? Is it just the more advanced runs that are powder? Does it usually say on the trail map?
That's actually a good question. Nearly all groomed trails are named, marked, and rated for difficulty.
Every morning, every resort I know of will post online and some on electronic boards what lifts are open and what trails been groomed and what trails are ungroomed.
The tell-tale sign of a groomed run is the smooth, level prepared corduroy surface. When new snow falls after grooming crews are are done, that fresh snow atop a firm base can be considered powder and when it's deeper, it's a great place to learn powder technique.
Many people refer to skiing in a few inches of fresh snow on top of a groomer as powder skiing and it is indeed sweet. I call that skiing cream or velvet or skiing hero snow. Everybody looks good. :-) A trail listed as groomed may have been groomed at midnight, but a bunch of snow overnight can turn any trail into a pretty legit powder run.
Most resorts have some black or blue/blacks defined trails cleared of trees that remain ungroomed - which means they don't have the smooth, even base. At busier resorts, these trails can get "skied out" and really bumped up forming moguls. Colorado resorts are famous for steep, technical moguls. It's a specialty and a delight unto itself. A fresh dump usually isn't enough to bury well-formed moguls completely and they are very challenging. I personally don't think of moguls as powder skiing even with fresh snow because it requires a different approach and skillset.
Utahns don't seem to like old snow and some resorts will periodically groom out or reset the bumps and let them reform. These ungroomed runs will still have trail names. They can be more challenging with that overnight powder dump because they've been grooved up by skiers and boarders - no smooth bottom. Be prepared for obstacles.
I use the term "off piste" to describe areas of the mountain that are never groomed and have not been cleared terrain (usually advanced/expert) -- often steep bowls and trees. While the trail maps may show a name, those names refer to a general area.
Off piste is tree and bowls and can be powder skiing when there's fresh lighter snow a/k/a powder. In other words,
off piste means off the machined groomed trails, but is not always synonymous with powder.
What many purists call powder skiing is skiing terrain that is
au naturale - wild, untamed, never groomed, generally unpredictable, and is characterized by natural obstacles - trees, rock ledges, cliffs, chutes, cornices, ravines, etc. For some, that means backcountry only. Depends on your mountain. Powder Mountain is more wild than most and the inbounds powder feels endless, but any mountain that goes enough days without fresh snow will eventually not have powder. You can still ski that off piste wild snow, but it ain't powder if it ain't fluffy.