Everyone who climbs Mt. Whitney probably signs the Summit Register to commemorate their accomplishment. Me too, I've done it four times in the last five years: Twice as an overnight from Whitney Portal, once as the final day of week-long trek from the west approach, and the most recent as a day-hike at age 68.
So what actually happens to those Summit Register pages that we all love to sign? I've heard some people say they go into the National Archive, but I've searched their website and not found it.
I've also Google'd it several ways -- still nothing.
For something as important as recording the individual achievements of thousands of people over the decades, you'd think it would be publicly accessible.