Overlanding coast to coast for free?

[WandereR]

I know some places have more BLM land than others for dispersed camping, which as I understand allows you to camp on for no more than 14 days on one location. Is there a known route that allows you to travel from Florida and go all the way up to Alaska's west coast for free? What would be involved going through that Canadian stretch heading up to Alaska?

Thank you!

 

[Marion Carter]

Isn't there a Trans American trail that covers that distance?