I think part of the reason base jumping is banned in Yosemite has to do with the spectacle of it. The National Park system was founded with a mission to preserve the serenity of our land, and to give its visitors an opportunity to experience solitude. But Yosemite Village is a lot like a city today. Unless you get more than a day's hike away from the valley floor, there's no hope of finding solitude or serenity. The…
A heavy, shod horse tromping around and pooping all over the place is going to do far more trail damage than mountain bikes.