Your Guide to a Great Northern Road Trip Tamara Gane Suggest time: 2-3 weeks The Great Northern Road Trip is an adventure you'll never forget. You'll start in the state of Washington and follow U.S. Highway 2 for the majority of the journey until you end in Maine. Along the way, you'll spend time in beautiful cities, pass over mountains, lakes, valleys, badlands, natural marvels, historical sites, and even cross the border into Canada. Before you get started, here's everything you need to plan a road trip, including budgeting, planning your route, choosing the right car, utilizing apps, and more.