State counting speed run

[adwerkema]

What's the shortest amount of time you can drive/walk to x amount of states?

x = 1 state: 0 minutes - you're already there.
x = 2 states: 0 minutes - stand on a border between two states.
x = 3 states: 0 minutes - stand on a tri-state border.
x = 4 states: 0 minutes - stand on the 4 corners monument.

x = 5 states: things finally get interesting. I think the answer is 1hr 9min and you can touch the states of TX, OK, NM, CO, and KS. Is there any shorter time for 5 states?

What about x = 6, 7, or 8 states?

[1995hoo]

This older thread raises a similar issue, although it doesn't mention walking.

[adwerkema]

This older thread raises a similar issue, although it doesn't mention walking.

Yikes, I don't know how I missed that thread when searching for similar topics.