Highest land altitude a tsunami has ever reached (record)
The worlds highest recorded tsunami occurred during a landslide triggered by an earthquake in 1958 in Lituya Bay, Alaska. The landslide sent the water 524 meters high the other side of the valley and left its contours in the vegetation. According to whitnesses, it lifted a glacier tip above the surrounding mountain tops.

https://geology.com/records/biggest-tsunami.shtml

https://earthquake.alaska.edu/60-years-ago-1958-earthquake-and-lituya-bay-megatsunami

I think this was the highest run-up on records (let's see if i get topped). But there probably occurred higher ones in earth's history. Candidates are asteroid impacts (e.g. Chicxulub) or flank collapses on volcanic islands.