Take the I-8E then CA-79 with a detour through Anza-Borrego Desert State Park for stunning desert landscapes and wildflower viewing if in bloom. This adds about 1.5h but is a highlighted spot.
Head northeast through scenic I-15 with an optional short detour to Cedar Breaks National Monument (about 1h off route), known for its colorful alpine amphitheater.
Drive east on I-70 and then north on US-40 through scenic Utah and Colorado landscapes, with a possible detour to Glenwood Canyon for short hikes and river views.
Drive the highest continuous paved road in the US for breathtaking mountain vistas and wildlife viewing. Dogs allowed only in areas such as campgrounds and parking lots.