If, like a salmon, you had to return to your birthplace to have a child, how far from where you live now would you have to travel?

I would have to fly from Seattle to SFO, then depending on 101 traffic, it may take me another 10 minutes, to 2 hours, to reach my parents' house, where somehow an arrangement would have already been made, and a woman is waiting for me, to copulate, and then she would have to wait in place for the next 9 months. 🤣