Yeah and SW Canyon really isn't long enough, it's just a short transition between working areas. It's like 2-3 turns and done - fun for the photogs, but underwhelming for the crews after you have done it a couple of times.
Best low level route in the US is the VR1355 up in OR/WA. You feel like you'll be arrested after landing.
I've flow it 5 or 6 times and it was always a great ride, especially when following the 'old A-6 route' that they used to fly really really low.