Staying at Furnace Creek that night, so had time to explore. Found a hike off of Emigrant Canyon Road listed in the Death Valley Hiking book. Not that easy to find, but the book had a good description of where to look. Follows an old road up to a mining camp and mill (Greene, Denner, Drake or something). Seemed to be a short enough hike that the kids could handle it, although it was all gradually uphill on the way there. As you can see, the road has almost been reclaimed.