The registry entry for its first ascent reads:
"MT JULIUS CAESAR (13,173) Aug. 12, 1928 - Having climbed this peak and finding no signs of previous ascent, we christen it Mt Julius Caesar since it is the highest unnamed peak overlooking the Italy Basin. - Alfred H. Prater, Myrtle Prater - 1247 Allen Ave - Glendale Calif - U.C. at L.A. - Aug 12, 1928".
Other notable registry entries include David Brower (1933) and Steve Roper (1959). Interestingly, the registry contains a 44 year gap from 1962 when it appears to have been lost down a crack to it's rediscovery on July 4, 2006. This rediscovery was mentioned in the Sierra Club's Wilderness Guardian, and described by Steve Bearman, one of the discoverers, as follows:
"After reaching the top of Mt. Julius Caesar and much frustrated searching for a registry, the four of us (Steve, Steven, Jeff, and Todd) fanned out to systematically search every crevice. Steven glimpsed the red canister too deep in a crack for us to reach. I climbed around below the northwest side of the peak, out onto the cliff, and managed to find an access point to reach into the bottom of the crevice."
Amazingly, the original entries had survived for 78 years in a rusty tobacco tin. They have since been brought to the Sierra Club for archiving.

