Technically any land border. Nobody will stop you but they're usually isolated and you'l just be stuck without a car.

Why are you walking over specifically and not driving?

>>2857321
can't afford a rental/ not old enough yet

>>2857323
nvm im old enough, but still cant afford it

>>2857315
Calais, Maine (the Canadian side looks so much richer and more developed)
Sault St Marie, Michigan
>>2857324
"Borrow" some random person's bicycle then

>>2857324
Where in Canada do you want to cross. Are you planning to be in BC or Ontario or what?

Depending on where you are it'll be easy enough to hitchike or find somebody willing to take you

There are many boarder crossings all along the US-Canadian border, it's not hard at all if you're a US or Canadian citizen. Just pick one you like and take a trip there

>>2857315
All border crossings in the Vancouver area have foot passenger crossings. The best is probably Peace Arch though as it is well connected to transit once you get to the other side. That crossing also has a pretty nice Provincial/State Park that is shared between the province and Washington State that straddles the border. You can walk around between the two countries pretty freely in he park. Buses will link up with transit exchanges and the skytrain which makes it pretty easy to get to downtown Vancouver and not spend too much time in the boring ass suburbs. If that is your thing though, you might want to try the Abbotsford Huntingdon Sumas crossing. Again there are buses on the Abbotsford side that go the short distance into town. Not much there, but the quiet farmland in the area on both sides of the border is pretty chill. Zero Avenue as well on either side of the border is an interesting sight with parallel roads passing along the border beside each other with markers showing each side. A lot of people bike or jog along those areas.

>>2860118
either or, i was looking to backpack or something