From Idaho Falls go south on I-15 to exit #47 (McCammon) take US 30 to the intersection with I-80 (about 6 miles west of Little America, WY) at Little America stop at the CONVENIENCE store and get your $0.75 soft ice cream cone. Go east on I-80 to Laramie, turn south on US 287 to Ft Collins. In Ft Collins go east on Co 14 about 2-3 miles to intersect with I-25, south to Denver.
You can do it in about 11 hours plus or minus. Stoping for fuel, pit stops and for food.
2005 Dodge, 2500, auto, 2wd. Pac brake PRXB. CB, Max Brake Brake Controller, Rhino Lining, Aero 60 gal. replacement tank.
1998 Hitchhiker ll, mod#31RLBGBW, RBW L'tl Rocker Hitch, Generac NP50 G generator