KanjiJLPT N3
Arrival

arrival, proceed, reach, attain, result in

Mnemonic

You reach the peak of the mountain and drive your knife into the rock to mark your arrival. You carve the date deep into stone so everyone who climbs after you knows: someone made it here first. The knife stays planted at the peak like a flag of triumph.
Additional thoughts
Picture the knife stabbed into the rocky peak like a flag — that dramatic gesture IS the arrival. The peak is the destination; the knife is what you plant to claim it.
Quick recall
Plant a knife in the peak to mark your arrival.

Details

The keyword for 到 is arrival. This kanji conveys the idea of reaching a destination or arriving at a particular place or point. It carries the sense of something coming to completion or attaining a goal, emphasizing the moment of finally getting there. It is often used in contexts related to reaching, attaining, or the thoroughness of an action carried through to its end.
On'yomi
とう
Kun'yomi
いた.る