So I've thought about where exactly the Sierra Madre would be. Dog carries the Courier from the abandoned BoS bunker while unconcious so I assume it is a days walk at max, so 40 miles or something max? Probably not across the Colorado and not east or north of the bunker because that would be the middle of the map. So we have to go south, somewhere south of Searchlight, probably California. What do you guys say?

(Yes this is something I think about when I can not sleep and then I get up to look at Google Maps.)