Closest - I can ride trails on my property, so 10 seconds from getting on my bike.
Driving to trails - most of the trail rides I like are anywhere between 10 minutes to 45 minutes from my house.
Shuttle trails - 10 minutes to 3 hours away. Well I guess if you include trips to dminor's place and the North Shore, it would be 9 and 10 hours, respectively.
Resorts - 2.5 hours to 10 hours away. Resorts that are a 2.5-3 hours away are usually day trips. Resorts 6 hours away are usually weekend/long weekend things. 10 hour resorts (i.e., Whistler) are usually at least a week (just because Whistler is awesome and has so much stuff) unless it's part of a bigger road trip.
I have flown about 3500 km to ride with mtnbiker66, gastro (cryptid01) and others in NC on a couple of occasions.