The Oregon Trail snakes its way toward Portland and we crossed its path several times on the journey to Mount Hood. People with oxen and wooden wagons with wooden wheels came down this hill on their way to the coast. A sign by this trail had a diagram of an ox-drawn wagon with a huge fir tree dragged behind it as a brake. Amazing. I would struggle to walk down it just on my own, nevermind leading several tonnes worth of stuff down it.