Was there last month...east of Reno, NV ... I think
This big rock is just off the interstate but sort of hidden. As Oregon and Emigrant pioneer/settlers travels along the Oregon Trail they used this rock to note their names so others coming behind them could see that they made it that far. There are hundreds if not thousands of names on Registry Rock. Pioneers used it as a landmark and knew it was ahead on the trail and were looking for it. Apparently it was right on the Oregon Trail. If I'm not mistaken Donners Pass
was west of Registry Rock about 100 miles.
Emigrant Trail marker:
Full Picture of Registry Rock:
A few signatures: