In Genesis, what was Noah’s first recorded act after leaving the Ark?

In Genesis, Noah’s first recorded act after leaving the Ark was building an altar.

Genesis 8:20 says Noah built an altar to the Lord after leaving the Ark and offered burnt offerings from animals and birds described as clean. The act marks the transition from survival inside the Ark to a renewed relationship between Noah, his family, and God.

The account then describes God’s covenant with Noah and the living creatures. The rainbow sign belongs to that covenant section, but the altar comes first in the sequence of Noah’s actions after disembarkation.

Noah’s later vineyard and drunkenness episode appears in Genesis 9, after the covenant narrative. That is why planting a vineyard is a plausible but incorrect answer to a question about his first recorded act after the Flood.