Here's the source that I was attempting to recall (I need to reread it myself): http://www.sciencemag.org/content/316/5825/736 http://www.sciencemag.org/conten

Here's the source that I was attempting to recall (I need to reread it myself): http://www.sciencemag.org/content/316/5825/736 http://www.sciencemag.org/content/316/5825/736 I can't find a link to back up 28 miles, but the site you referenced has two or three in the 17-22 mile range that look encouraging. I'm not certain that those numbers include forest roads in the measurement though; it might be just distance from public roads. The River of No Return Wilderness looks amazing - thanks!