Footprint
noun
Foot traces are footprints.
あしあと
The reading is the kun'yomi vocab readings of the kanji, put together.
雪の上に熊の足跡を見つけた瞬間、ポケットの中のナイフを握りしめました。
When I saw a bear’s footprints in the snow, I tightly grasped the knife in my pocket.