I meant to put a link up for Dry Falls State Park.
http://en.wikipedia.org/wiki/Dry_Falls
If you go to the high resolution version of the photo in the wiki you can see a Jeep road in the right half of the picture. I once witnessed a BMW 740 driven no doubt by some Microsoft or Amazon yuppie type, visiting from western Washington, going at least 35 on it as though it was a nicely paved road. I think I saw the car get some air at one point over a rise. I can imagine he had never been off asphalt before. Most people in pickups and SUVs go 10-15 on the road, less where it’s rocky and are in no great hurry.