The peak of Mt. Fuji was covered with snow.
彼はついに事業の峰を極めた。
He finally reached the peak of his career.
back of a blade
Specifically the blunt back edge of a single-edged blade like a katana. Contrasts with the cutting edge (刃).
刀の峰で相手の腕を打った。
He struck the opponent's arm with the back of the blade.
The climbers crossed the steep ridge toward the village.
The samurai struck his opponent with the back of his sword, sparing his life.
In his youth he was a climber who had conquered many peaks.
峰 is the blunt, unsharpened back ridge of a blade, the opposite side from the 刃先 that actually cuts.
volcanic crater rim; the rim of a volcano · sumo ring; wrestling ring · critical situation; sink-or-swim moment; do-or-die position
Alternate kanji also meaning peak or summit. Less common than 峰.