A couple of routes from north SD County to Colter Bay, Grand Teton N.P.

Route #1 (leaves I-15 at Brigham City, Utah, more camping opportunities compared to the other route; 1,026 mi – 16 hours 2 mins)

Route #2 (leaves I-15 at Idaho Falls, 158 more freeway miles; 1,059 mi – 16 hours 3 mins)

When viewing the maps you can put the cursor on the route line and drag it to a new route to look at alternatives. Also, click on the camera icons on the left hand side of the screen to see a road-level view of the exits and turns.