The way I view it, and not saying it's a true representation, but just from riding in there, is that there are two levels to SSP. I ride a bunch of trails at the 1050 - 1200 foot range, and have a great time. I ride a bunch of the trails at the 650 - 800 foot range, and have a great time. And sometimes, I have to go between the two. And that can be a bit of a drag. Rode on Sunday, starting out from near Waterloo, was going along for and hour 20 in the 650 - 820 range, then spent the next 20 minutes (walking some as I'm out of shape
going up to 1140. Rode there for a half hour, then came back down to the 700- 800 range. Where as the week before, I rode for an hour and a half at the 1100 foot range and had a fine time. That's coming in from more the ITC side.
Again, not a complete representation, as the white trail for example can span the two realms, and there are other trails that do the same, but just from riding it there, that's how I view it. So I pick and choose which side I come in on, and, if I'm in the mood to span the two, when I pick the path I'm riding.