[notyourday]

If your ambient temperature is 25C, then your ground temperature is going to be way too high. It is simply not possible to cover 4-5 mile runs with 10" base at above freezing and keep it there for 3-4 months. Even if you do, first rain is going to chew through your base, not to mention the totally regular damage from skiers and snowboarders.

[cmrdporcupine]

Ground temp might not be that high if you're just talking about daily swings, which is how things have been going here in the east. Brutal cold followed by swings well above zero and rain.