What was the first thing Noah did after leaving the Ark, according to Genesis?

According to Genesis, Noah’s first recorded act after leaving the Ark was building an altar to the Lord. Genesis 8:20 says Noah built the altar and offered burnt offerings from clean animals and clean birds.

This episode follows God’s command for Noah, his family, and the animals to leave the Ark after the ground had dried. The altar therefore marks the first action explicitly narrated after the survivors emerge.

Noah’s vineyard comes later. Genesis 9:20 says he then began farming and planted a vineyard, so the vineyard is not the first post-Ark action in the text.

The sacrifice also connects with the earlier distinction between clean and unclean animals. Genesis 7:2–3 gives Noah special instructions about the number of clean animals, while Genesis 8 uses some of them in the offering. The passage presents the altar as an act of worship and thanksgiving after survival.