...trails rolling up under lifts? Whistler, Vail, or Park City would require so much clicking
The
Vail Resorts format has summary of open lifts/trail/terrain at the top of the page. I go through these for every season progress report I write, so I'm confident the numbers don't change based upon whether it's during operating hours or not. Usually SnoCountry will match those summary numbers.
The specific trails listed under each lift? It's possible those change by time of day but only very occasionally do I drill down that far. I have to do it for Alta because: 1) There is no summary, and 2) SnoCountry is not credible for Alta.
I feel like ski resorts bury 'bad conditions' in a vast number of click menus that you cannot accurately attain what is - or is not - open.
That would be Mt. Baldy, which only lists chairs running and a generalized paragraph narrative. Big Bear and Mt. High are like Alta, no summary but a list of every trail and whether it's open. That's easy to handle for areas of that size; more time consuming at Alta's size.
I think it's mostly variable IT design in terms of ski area website user friendliness. And I see no correlation between website user friendliness and overall snow reliability. Alta's website until recently had no trail status enumeration whatsoever, aside from the list of sectors (Ballroom, Backside, Devil's Castle, etc.) subject to avalanche control. I don't ascribe Mt. Baldy's uninformative website to its snow reliability (note Mt. High counterexample), but to its overall amateur management.
Give me an open/closed map - lifts and slopes. A grooming report.
I really, really want an accurate concise summary of "X out of Y acres" (preferred) and/or "X out of Y trails" open. This gives you the big picture in seconds without much clicking. In early season when X/Y is 10% or less like it is now at Solitude
, I think that's all you need to know. X/Y < 50% at Christmas generally means high skier density and don't expect much in the way of advanced and/or ungroomed terrain.
Next priority to me is a list of runs and whether they are open and/or groomed. And yes DON'T CHANGE THAT LIST when the lifts close for the day. At large ski areas it probably does make sense to group by lift or terrain sector. One nice feature on some of the Alterra pages is a filter button with an option to show only open runs. One thing that annoys me about IT designers (Tesla comes to mind with its map that automatically self centers after ~30 seconds starting a couple of months ago) is when they change things but remove prior useful functions. When in doubt give the user a choice of the prior or new functionality.