NC to Portland OR in March

[Foy]

........I-80 does not run from DEN to SLC.

As glc noted, the only safe prediction for weather 2 months from now is "GOK" (God Only Knows).

Interstates in the Mountain West feature long grades, but they're of carefully-designed limited gradients and the curve radii are carefully designed (no hairpins/switchbacks). If you're a Michigander, and can take a bit of time to look ahead at conditions (internet, state DOT 511 phone numbers, etc), there is little chance of you driving into a mess.

If you'd exit our home state of NC via I-40, you do know it's closed at the TN line and is likely to remain so until early March, don't you?

Foy