The smolt stage is when the salmon start to go to the ocean. They are 1 to 2 years old. The smolt will spend a little while in an estuary place in the river while they get used to the salt water. Did you know that out of the 1,000 or so of eggs that a salmon lays, only about 3 or 4 survive and come back to spawn! After the salmon reaches the ocean it will live there for 4 to 6 years. Then it returns to the same stream or river where it was spawned, starting the life cycle again.