First of all, remember that just because loads are high doesn't mean that yields are high. A major carrier could have a full flight, while an LCC could have a half-empty flight, and depending on fares, the LCC may still be more profitable on that route.
How about Aspen, Telluride, Durango, Etc? All those places are short rides with little to no competition and rates are extremely high!
No way. These are low-yield leisure destinations. While skiers are probably willing to pay a bit more than your average leisure-fare customer, they're still not going to be the most profitable. Also, I just checked fares to these destinations -- they ranged from $265 to $305 round-trip. Maybe a bit much for a short route, but I wouldn't call them "extremely" high. Also, most people from Denver will drive these routes; most of the passengers are probably connecting, so who knows what price they paid.
"Lose" is not spelled with two o's!!!!